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 <div class="subTitle">org.apache.commons.math3.optimization.general</div>
 <h2 title="Class AbstractLeastSquaresOptimizer" class="title">Class AbstractLeastSquaresOptimizer</h2>
 </div>
 <div class="contentContainer">
 <ul class="inheritance">
 <li><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
 <li>
 <ul class="inheritance">
 <li><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html" title="class in org.apache.commons.math3.optimization.direct">org.apache.commons.math3.optimization.direct.BaseAbstractMultivariateVectorOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&gt;</li>
 <li>
 <ul class="inheritance">
 <li>org.apache.commons.math3.optimization.general.AbstractLeastSquaresOptimizer</li>
 </ul>
 </li>
 </ul>
 </li>
 </ul>
 <div class="description">
 <ul class="blockList">
 <li class="blockList">
 <dl>
 <dt>All Implemented Interfaces:</dt>
 <dd><a href="../../../../../../org/apache/commons/math3/optimization/BaseMultivariateVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">BaseMultivariateVectorOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&gt;, <a href="../../../../../../org/apache/commons/math3/optimization/BaseOptimizer.html" title="interface in org.apache.commons.math3.optimization">BaseOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a>&gt;, <a href="../../../../../../org/apache/commons/math3/optimization/DifferentiableMultivariateVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">DifferentiableMultivariateVectorOptimizer</a></dd>
 </dl>
 <dl>
 <dt>Direct Known Subclasses:</dt>
 <dd><a href="../../../../../../org/apache/commons/math3/optimization/general/GaussNewtonOptimizer.html" title="class in org.apache.commons.math3.optimization.general">GaussNewtonOptimizer</a>, <a href="../../../../../../org/apache/commons/math3/optimization/general/LevenbergMarquardtOptimizer.html" title="class in org.apache.commons.math3.optimization.general">LevenbergMarquardtOptimizer</a></dd>
 </dl>
 <hr>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1 (to be removed in 4.0).</i></div>
 </div>
 <br>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 public abstract class <span class="strong">AbstractLeastSquaresOptimizer</span>
 extends <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html" title="class in org.apache.commons.math3.optimization.direct">BaseAbstractMultivariateVectorOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&gt;
 implements <a href="../../../../../../org/apache/commons/math3/optimization/DifferentiableMultivariateVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">DifferentiableMultivariateVectorOptimizer</a></pre>
 <div class="block">Base class for implementing least squares optimizers.
  It handles the boilerplate methods associated to thresholds settings,
  Jacobian and error estimation.
  <br/>
  This class constructs the Jacobian matrix of the function argument in method
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)"><code>optimize</code></a> and assumes that the rows of that matrix iterate on the model
  functions while the columns iterate on the parameters; thus, the numbers
  of rows is equal to the dimension of the
  <a href="../../../../../../org/apache/commons/math3/optimization/Target.html" title="class in org.apache.commons.math3.optimization"><code>Target</code></a> while
  the number of columns is equal to the dimension of the
  <a href="../../../../../../org/apache/commons/math3/optimization/InitialGuess.html" title="class in org.apache.commons.math3.optimization"><code>InitialGuess</code></a>.</div>
 <dl><dt><span class="strong">Since:</span></dt>
   <dd>1.2</dd>
 <dt><span class="strong">Version:</span></dt>
   <dd>$Id: AbstractLeastSquaresOptimizer.java 1591835 2014-05-02 09:04:01Z tn $</dd></dl>
 </li>
 </ul>
 </div>
 <div class="summary">
 <ul class="blockList">
 <li class="blockList">
 <!-- =========== FIELD SUMMARY =========== -->
 <ul class="blockList">
 <li class="blockList"><a name="field_summary">
 <!--   -->
 </a>
 <h3>Field Summary</h3>
 <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
 <caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Field and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected int</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#cols">cols</a></strong></code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1.</i></div>
 </div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected double</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#cost">cost</a></strong></code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Field to become "private" in 4.0.
  Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#setCost(double)"><code>setCost(double)</code></a>.</i></div>
 </div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected double[]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#objective">objective</a></strong></code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1.</i></div>
 </div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected double[]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#point">point</a></strong></code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1.</i></div>
 </div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected int</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#rows">rows</a></strong></code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1.</i></div>
 </div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected double[][]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#weightedResidualJacobian">weightedResidualJacobian</a></strong></code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. To be removed in 4.0. Please use
  <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeWeightedJacobian(double[])"><code>computeWeightedJacobian(double[])</code></a> instead.</i></div>
 </div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected double[]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#weightedResiduals">weightedResiduals</a></strong></code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1.</i></div>
 </div>
 </td>
 </tr>
 </table>
 <ul class="blockList">
 <li class="blockList"><a name="fields_inherited_from_class_org.apache.commons.math3.optimization.direct.BaseAbstractMultivariateVectorOptimizer">
 <!--   -->
 </a>
 <h3>Fields inherited from class&nbsp;org.apache.commons.math3.optimization.direct.<a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html" title="class in org.apache.commons.math3.optimization.direct">BaseAbstractMultivariateVectorOptimizer</a></h3>
 <code><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#evaluations">evaluations</a></code></li>
 </ul>
 </li>
 </ul>
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <ul class="blockList">
 <li class="blockList"><a name="constructor_summary">
 <!--   -->
 </a>
 <h3>Constructor Summary</h3>
 <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
 <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier</th>
 <th class="colLast" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected </code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#AbstractLeastSquaresOptimizer()">AbstractLeastSquaresOptimizer</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>See <a href="../../../../../../org/apache/commons/math3/optimization/SimpleValueChecker.html#SimpleValueChecker()"><code>SimpleValueChecker.SimpleValueChecker()</code></a></i></div>
 </div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected </code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#AbstractLeastSquaresOptimizer(org.apache.commons.math3.optimization.ConvergenceChecker)">AbstractLeastSquaresOptimizer</a></strong>(<a href="../../../../../../org/apache/commons/math3/optimization/ConvergenceChecker.html" title="interface in org.apache.commons.math3.optimization">ConvergenceChecker</a>&lt;<a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a>&gt;&nbsp;checker)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 &nbsp;</td>
 </tr>
 </table>
 </li>
 </ul>
 <!-- ========== METHOD SUMMARY =========== -->
 <ul class="blockList">
 <li class="blockList"><a name="method_summary">
 <!--   -->
 </a>
 <h3>Method Summary</h3>
 <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected double</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCost(double[])">computeCost</a></strong>(double[]&nbsp;residuals)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Computes the cost.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>double[][]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCovariances(double[], double)">computeCovariances</a></strong>(double[]&nbsp;params,
                   double&nbsp;threshold)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Get the covariance matrix of the optimized parameters.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected double[]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeResiduals(double[])">computeResiduals</a></strong>(double[]&nbsp;objectiveValue)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Computes the residuals.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>double[]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeSigma(double[], double)">computeSigma</a></strong>(double[]&nbsp;params,
             double&nbsp;covarianceSingularityThreshold)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Computes an estimate of the standard deviation of the parameters.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/commons/math3/linear/RealMatrix.html" title="interface in org.apache.commons.math3.linear">RealMatrix</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeWeightedJacobian(double[])">computeWeightedJacobian</a></strong>(double[]&nbsp;params)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Computes the Jacobian matrix.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>double</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getChiSquare()">getChiSquare</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Get a Chi-Square-like value assuming the N residuals follow N
  distinct normal distributions centered on 0 and whose variances are
  the reciprocal of the weights.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>double[][]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getCovariances()">getCovariances</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCovariances(double[], double)"><code>computeCovariances(double[],double)</code></a>
  instead.</i></div>
 </div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>double[][]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getCovariances(double)">getCovariances</a></strong>(double&nbsp;threshold)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCovariances(double[], double)"><code>computeCovariances(double[],double)</code></a>
  instead.</i></div>
 </div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getJacobianEvaluations()">getJacobianEvaluations</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 &nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>double</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getRMS()">getRMS</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Get the Root Mean Square value.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/commons/math3/linear/RealMatrix.html" title="interface in org.apache.commons.math3.linear">RealMatrix</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getWeightSquareRoot()">getWeightSquareRoot</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Gets the square-root of the weight matrix.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>double[]</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#guessParametersErrors()">guessParametersErrors</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>as of version 3.1, <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeSigma(double[], double)"><code>computeSigma(double[],double)</code></a> should be used
  instead. It should be emphasized that <code>guessParametersErrors</code> and
  <code>computeSigma</code> are <em>not</em> strictly equivalent.</i></div>
 </div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#optimize(int, org.apache.commons.math3.analysis.DifferentiableMultivariateVectorFunction, double[], double[], double[])">optimize</a></strong>(int&nbsp;maxEval,
         <a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&nbsp;f,
         double[]&nbsp;target,
         double[]&nbsp;weights,
         double[]&nbsp;startPoint)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Please use
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)"><code>optimize(int,MultivariateDifferentiableVectorFunction,OptimizationData...)</code></a>
  instead.</i></div>
 </div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code><a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#optimize(int, org.apache.commons.math3.analysis.differentiation.MultivariateDifferentiableVectorFunction, double[], double[], double[])">optimize</a></strong>(int&nbsp;maxEval,
         <a href="../../../../../../org/apache/commons/math3/analysis/differentiation/MultivariateDifferentiableVectorFunction.html" title="interface in org.apache.commons.math3.analysis.differentiation">MultivariateDifferentiableVectorFunction</a>&nbsp;f,
         double[]&nbsp;target,
         double[]&nbsp;weights,
         double[]&nbsp;startPoint)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Please use
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)"><code>optimize(int,MultivariateDifferentiableVectorFunction,OptimizationData...)</code></a>
  instead.</i></div>
 </div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#optimizeInternal(int, org.apache.commons.math3.analysis.differentiation.MultivariateDifferentiableVectorFunction, org.apache.commons.math3.optimization.OptimizationData...)">optimizeInternal</a></strong>(int&nbsp;maxEval,
                 <a href="../../../../../../org/apache/commons/math3/analysis/differentiation/MultivariateDifferentiableVectorFunction.html" title="interface in org.apache.commons.math3.analysis.differentiation">MultivariateDifferentiableVectorFunction</a>&nbsp;f,
                 <a href="../../../../../../org/apache/commons/math3/optimization/OptimizationData.html" title="interface in org.apache.commons.math3.optimization">OptimizationData</a>...&nbsp;optData)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Override is necessary only until this class's generic
  argument is changed to <code>MultivariateDifferentiableVectorFunction</code>.</i></div>
 </div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#setCost(double)">setCost</a></strong>(double&nbsp;cost)</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Sets the cost.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#setUp()">setUp</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;</div>
 <div class="block">Method which a subclass <em>must</em> override whenever its internal
  state depend on the <a href="../../../../../../org/apache/commons/math3/optimization/OptimizationData.html" title="interface in org.apache.commons.math3.optimization"><code>input</code></a> parsed by this base
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 <tr class="rowColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#updateJacobian()">updateJacobian</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeWeightedJacobian(double[])"><code>computeWeightedJacobian(double[])</code></a>
  instead.</i></div>
 </div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected void</code></td>
 <td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#updateResidualsAndCost()">updateResidualsAndCost</a></strong>()</code>
 <div class="block"><strong>Deprecated.</strong>&nbsp;
 <div class="block"><i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeResiduals(double[])"><code>computeResiduals(double[])</code></a>,
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#computeObjectiveValue(double[])"><code>BaseAbstractMultivariateVectorOptimizer.computeObjectiveValue(double[])</code></a>, <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCost(double[])"><code>computeCost(double[])</code></a>
  and <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#setCost(double)"><code>setCost(double)</code></a> instead.</i></div>
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 <h3>Methods inherited from class&nbsp;org.apache.commons.math3.optimization.direct.<a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html" title="class in org.apache.commons.math3.optimization.direct">BaseAbstractMultivariateVectorOptimizer</a></h3>
 <code><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#computeObjectiveValue(double[])">computeObjectiveValue</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#doOptimize()">doOptimize</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getConvergenceChecker()">getConvergenceChecker</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getEvaluations()">getEvaluations</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getMaxEvaluations()">getMaxEvaluations</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getObjectiveFunction()">getObjectiveFunction</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getStartPoint()">getStartPoint</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getTarget()">getTarget</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getTargetRef()">getTargetRef</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getWeight()">getWeight</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#getWeightRef()">getWeightRef</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)">optimize</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimizeInternal(int, FUNC, double[], double[], double[])">optimizeInternal</a>, <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimizeInternal(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)">optimizeInternal</a></code></li>
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 <code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li>
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 <h3>Methods inherited from interface&nbsp;org.apache.commons.math3.optimization.<a href="../../../../../../org/apache/commons/math3/optimization/BaseOptimizer.html" title="interface in org.apache.commons.math3.optimization">BaseOptimizer</a></h3>
 <code><a href="../../../../../../org/apache/commons/math3/optimization/BaseOptimizer.html#getConvergenceChecker()">getConvergenceChecker</a>, <a href="../../../../../../org/apache/commons/math3/optimization/BaseOptimizer.html#getEvaluations()">getEvaluations</a>, <a href="../../../../../../org/apache/commons/math3/optimization/BaseOptimizer.html#getMaxEvaluations()">getMaxEvaluations</a></code></li>
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 <h3>Field Detail</h3>
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 <h4>weightedResidualJacobian</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;double[][] weightedResidualJacobian</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. To be removed in 4.0. Please use
  <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeWeightedJacobian(double[])"><code>computeWeightedJacobian(double[])</code></a> instead.</i></div>
 <div class="block">Jacobian matrix of the weighted residuals.
  This matrix is in canonical form just after the calls to
  <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#updateJacobian()"><code>updateJacobian()</code></a>, but may be modified by the solver
  in the derived class (the <a href="../../../../../../org/apache/commons/math3/optimization/general/LevenbergMarquardtOptimizer.html" title="class in org.apache.commons.math3.optimization.general"><code>Levenberg-Marquardt optimizer</code></a> does this).</div>
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 <h4>cols</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;int cols</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1.</i></div>
 <div class="block">Number of columns of the jacobian matrix.</div>
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 <h4>rows</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;int rows</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1.</i></div>
 <div class="block">Number of rows of the jacobian matrix.</div>
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 <h4>point</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;double[] point</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1.</i></div>
 <div class="block">Current point.</div>
 </li>
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 <h4>objective</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;double[] objective</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1.</i></div>
 <div class="block">Current objective function value.</div>
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 <h4>weightedResiduals</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;double[] weightedResiduals</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1.</i></div>
 <div class="block">Weighted residuals</div>
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 <h4>cost</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;double cost</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Field to become "private" in 4.0.
  Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#setCost(double)"><code>setCost(double)</code></a>.</i></div>
 <div class="block">Cost value (square root of the sum of the residuals).</div>
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 <h3>Constructor Detail</h3>
 <a name="AbstractLeastSquaresOptimizer()">
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 <h4>AbstractLeastSquaresOptimizer</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;AbstractLeastSquaresOptimizer()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>See <a href="../../../../../../org/apache/commons/math3/optimization/SimpleValueChecker.html#SimpleValueChecker()"><code>SimpleValueChecker.SimpleValueChecker()</code></a></i></div>
 <div class="block">Simple constructor with default settings.
  The convergence check is set to a <a href="../../../../../../org/apache/commons/math3/optimization/SimpleVectorValueChecker.html" title="class in org.apache.commons.math3.optimization"><code>SimpleVectorValueChecker</code></a>.</div>
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 <pre>protected&nbsp;AbstractLeastSquaresOptimizer(<a href="../../../../../../org/apache/commons/math3/optimization/ConvergenceChecker.html" title="interface in org.apache.commons.math3.optimization">ConvergenceChecker</a>&lt;<a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a>&gt;&nbsp;checker)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>checker</code> - Convergence checker.</dd></dl>
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 <a name="getJacobianEvaluations()">
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 <h4>getJacobianEvaluations</h4>
 <pre>public&nbsp;int&nbsp;getJacobianEvaluations()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>the number of evaluations of the Jacobian function.</dd></dl>
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 <a name="updateJacobian()">
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 <h4>updateJacobian</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;void&nbsp;updateJacobian()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeWeightedJacobian(double[])"><code>computeWeightedJacobian(double[])</code></a>
  instead.</i></div>
 <div class="block">Update the jacobian matrix.</div>
 <dl><dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if the Jacobian dimension does not
  match problem dimension.</dd></dl>
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 <pre>protected&nbsp;<a href="../../../../../../org/apache/commons/math3/linear/RealMatrix.html" title="interface in org.apache.commons.math3.linear">RealMatrix</a>&nbsp;computeWeightedJacobian(double[]&nbsp;params)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Computes the Jacobian matrix.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>params</code> - Model parameters at which to compute the Jacobian.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the weighted Jacobian: W<sup>1/2</sup> J.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if the Jacobian dimension does not
  match problem dimension.</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd></dl>
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 <a name="updateResidualsAndCost()">
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 <h4>updateResidualsAndCost</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;void&nbsp;updateResidualsAndCost()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeResiduals(double[])"><code>computeResiduals(double[])</code></a>,
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#computeObjectiveValue(double[])"><code>BaseAbstractMultivariateVectorOptimizer.computeObjectiveValue(double[])</code></a>, <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCost(double[])"><code>computeCost(double[])</code></a>
  and <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#setCost(double)"><code>setCost(double)</code></a> instead.</i></div>
 <div class="block">Update the residuals array and cost function value.</div>
 <dl><dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if the dimension does not match the
  problem dimension.</dd>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/TooManyEvaluationsException.html" title="class in org.apache.commons.math3.exception">TooManyEvaluationsException</a></code> - if the maximal number of evaluations is exceeded.</dd></dl>
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 <pre>protected&nbsp;double&nbsp;computeCost(double[]&nbsp;residuals)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Computes the cost.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>residuals</code> - Residuals.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the cost.</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd>
 <dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeResiduals(double[])"><code>computeResiduals(double[])</code></a></dd></dl>
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 <h4>getRMS</h4>
 <pre>public&nbsp;double&nbsp;getRMS()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Get the Root Mean Square value.
  Get the Root Mean Square value, i.e. the root of the arithmetic
  mean of the square of all weighted residuals. This is related to the
  criterion that is minimized by the optimizer as follows: if
  <em>c</em> if the criterion, and <em>n</em> is the number of
  measurements, then the RMS is <em>sqrt (c/n)</em>.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>RMS value</dd></dl>
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 <h4>getChiSquare</h4>
 <pre>public&nbsp;double&nbsp;getChiSquare()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Get a Chi-Square-like value assuming the N residuals follow N
  distinct normal distributions centered on 0 and whose variances are
  the reciprocal of the weights.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>chi-square value</dd></dl>
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 <a name="getWeightSquareRoot()">
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 <h4>getWeightSquareRoot</h4>
 <pre>public&nbsp;<a href="../../../../../../org/apache/commons/math3/linear/RealMatrix.html" title="interface in org.apache.commons.math3.linear">RealMatrix</a>&nbsp;getWeightSquareRoot()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Gets the square-root of the weight matrix.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>the square-root of the weight matrix.</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd></dl>
 </li>
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 <a name="setCost(double)">
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 <h4>setCost</h4>
 <pre>protected&nbsp;void&nbsp;setCost(double&nbsp;cost)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Sets the cost.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>cost</code> - Cost value.</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd></dl>
 </li>
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 <h4>getCovariances</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 public&nbsp;double[][]&nbsp;getCovariances()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCovariances(double[], double)"><code>computeCovariances(double[],double)</code></a>
  instead.</i></div>
 <div class="block">Get the covariance matrix of the optimized parameters.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>the covariance matrix.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/linear/SingularMatrixException.html" title="class in org.apache.commons.math3.linear">SingularMatrixException</a></code> - if the covariance matrix cannot be computed (singular problem).</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getCovariances(double)"><code>getCovariances(double)</code></a></dd></dl>
 </li>
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 <h4>getCovariances</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 public&nbsp;double[][]&nbsp;getCovariances(double&nbsp;threshold)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Please use <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCovariances(double[], double)"><code>computeCovariances(double[],double)</code></a>
  instead.</i></div>
 <div class="block">Get the covariance matrix of the optimized parameters.
  <br/>
  Note that this operation involves the inversion of the
  <code>J<sup>T</sup>J</code> matrix, where <code>J</code> is the
  Jacobian matrix.
  The <code>threshold</code> parameter is a way for the caller to specify
  that the result of this computation should be considered meaningless,
  and thus trigger an exception.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>threshold</code> - Singularity threshold.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the covariance matrix.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/linear/SingularMatrixException.html" title="class in org.apache.commons.math3.linear">SingularMatrixException</a></code> - if the covariance matrix cannot be computed (singular problem).</dd></dl>
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 <pre>public&nbsp;double[][]&nbsp;computeCovariances(double[]&nbsp;params,
                             double&nbsp;threshold)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Get the covariance matrix of the optimized parameters.
  <br/>
  Note that this operation involves the inversion of the
  <code>J<sup>T</sup>J</code> matrix, where <code>J</code> is the
  Jacobian matrix.
  The <code>threshold</code> parameter is a way for the caller to specify
  that the result of this computation should be considered meaningless,
  and thus trigger an exception.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>params</code> - Model parameters.</dd><dd><code>threshold</code> - Singularity threshold.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the covariance matrix.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/linear/SingularMatrixException.html" title="class in org.apache.commons.math3.linear">SingularMatrixException</a></code> - if the covariance matrix cannot be computed (singular problem).</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd></dl>
 </li>
 </ul>
 <a name="guessParametersErrors()">
 <!--   -->
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 <h4>guessParametersErrors</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 public&nbsp;double[]&nbsp;guessParametersErrors()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>as of version 3.1, <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeSigma(double[], double)"><code>computeSigma(double[],double)</code></a> should be used
  instead. It should be emphasized that <code>guessParametersErrors</code> and
  <code>computeSigma</code> are <em>not</em> strictly equivalent.</i></div>
 <div class="block"><p>
  Returns an estimate of the standard deviation of each parameter. The
  returned values are the so-called (asymptotic) standard errors on the
  parameters, defined as <code>sd(a[i]) = sqrt(S / (n - m) * C[i][i])</code>,
  where <code>a[i]</code> is the optimized value of the <code>i</code>-th parameter,
  <code>S</code> is the minimized value of the sum of squares objective function
  (as returned by <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#getChiSquare()"><code>getChiSquare()</code></a>), <code>n</code> is the number of
  observations, <code>m</code> is the number of parameters and <code>C</code> is the
  covariance matrix.
  </p>
  <p>
  See also
  <a href="http://en.wikipedia.org/wiki/Least_squares">Wikipedia</a>,
  or
  <a href="http://mathworld.wolfram.com/LeastSquaresFitting.html">MathWorld</a>,
  equations (34) and (35) for a particular case.
  </p></div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>an estimate of the standard deviation of the optimized parameters</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/linear/SingularMatrixException.html" title="class in org.apache.commons.math3.linear">SingularMatrixException</a></code> - if the covariance matrix cannot be computed.</dd>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/NumberIsTooSmallException.html" title="class in org.apache.commons.math3.exception">NumberIsTooSmallException</a></code> - if the number of degrees of freedom is not
  positive, i.e. the number of measurements is less or equal to the number of
  parameters.</dd></dl>
 </li>
 </ul>
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 <pre>public&nbsp;double[]&nbsp;computeSigma(double[]&nbsp;params,
                     double&nbsp;covarianceSingularityThreshold)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Computes an estimate of the standard deviation of the parameters. The
  returned values are the square root of the diagonal coefficients of the
  covariance matrix, <code>sd(a[i]) ~= sqrt(C[i][i])</code>, where <code>a[i]</code>
  is the optimized value of the <code>i</code>-th parameter, and <code>C</code> is
  the covariance matrix.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>params</code> - Model parameters.</dd><dd><code>covarianceSingularityThreshold</code> - Singularity threshold (see
  <a href="../../../../../../org/apache/commons/math3/optimization/general/AbstractLeastSquaresOptimizer.html#computeCovariances(double[], double)"><code>computeCovariances</code></a>).</dd>
 <dt><span class="strong">Returns:</span></dt><dd>an estimate of the standard deviation of the optimized parameters</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/linear/SingularMatrixException.html" title="class in org.apache.commons.math3.linear">SingularMatrixException</a></code> - if the covariance matrix cannot be computed.</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd></dl>
 </li>
 </ul>
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 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 public&nbsp;<a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a>&nbsp;optimize(int&nbsp;maxEval,
                                        <a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&nbsp;f,
                                        double[]&nbsp;target,
                                        double[]&nbsp;weights,
                                        double[]&nbsp;startPoint)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Please use
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)"><code>optimize(int,MultivariateDifferentiableVectorFunction,OptimizationData...)</code></a>
  instead.</i></div>
 <div class="block">Optimize an objective function.
  Optimization is considered to be a weighted least-squares minimization.
  The cost function to be minimized is
  <code>&sum;weight<sub>i</sub>(objective<sub>i</sub> - target<sub>i</sub>)<sup>2</sup></code></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/optimization/BaseMultivariateVectorOptimizer.html#optimize(int, FUNC, double[], double[], double[])">optimize</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/commons/math3/optimization/BaseMultivariateVectorOptimizer.html" title="interface in org.apache.commons.math3.optimization">BaseMultivariateVectorOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&gt;</code></dd>
 <dt><strong>Overrides:</strong></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, double[], double[], double[])">optimize</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html" title="class in org.apache.commons.math3.optimization.direct">BaseAbstractMultivariateVectorOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&gt;</code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>maxEval</code> - Maximum number of function evaluations.</dd><dd><code>f</code> - Objective function.</dd><dd><code>target</code> - Target value for the objective functions at optimum.</dd><dd><code>weights</code> - Weights for the least squares cost computation.</dd><dd><code>startPoint</code> - Start point for optimization.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the point/value pair giving the optimal value for objective
  function.</dd></dl>
 </li>
 </ul>
 <a name="optimize(int, org.apache.commons.math3.analysis.differentiation.MultivariateDifferentiableVectorFunction, double[], double[], double[])">
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 <h4>optimize</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 public&nbsp;<a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a>&nbsp;optimize(int&nbsp;maxEval,
                                        <a href="../../../../../../org/apache/commons/math3/analysis/differentiation/MultivariateDifferentiableVectorFunction.html" title="interface in org.apache.commons.math3.analysis.differentiation">MultivariateDifferentiableVectorFunction</a>&nbsp;f,
                                        double[]&nbsp;target,
                                        double[]&nbsp;weights,
                                        double[]&nbsp;startPoint)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Please use
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)"><code>optimize(int,MultivariateDifferentiableVectorFunction,OptimizationData...)</code></a>
  instead.</i></div>
 <div class="block">Optimize an objective function.
  Optimization is considered to be a weighted least-squares minimization.
  The cost function to be minimized is
  <code>&sum;weight<sub>i</sub>(objective<sub>i</sub> - target<sub>i</sub>)<sup>2</sup></code></div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>f</code> - Objective function.</dd><dd><code>target</code> - Target value for the objective functions at optimum.</dd><dd><code>weights</code> - Weights for the least squares cost computation.</dd><dd><code>startPoint</code> - Start point for optimization.</dd><dd><code>maxEval</code> - Maximum number of function evaluations.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the point/value pair giving the optimal value for objective
  function.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if the start point dimension is wrong.</dd>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/TooManyEvaluationsException.html" title="class in org.apache.commons.math3.exception">TooManyEvaluationsException</a></code> - if the maximal number of evaluations is exceeded.</dd>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/NullArgumentException.html" title="class in org.apache.commons.math3.exception">NullArgumentException</a></code> - if
  any argument is <code>null</code>.</dd></dl>
 </li>
 </ul>
 <a name="optimizeInternal(int, org.apache.commons.math3.analysis.differentiation.MultivariateDifferentiableVectorFunction, org.apache.commons.math3.optimization.OptimizationData...)">
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 <h4>optimizeInternal</h4>
 <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
 protected&nbsp;<a href="../../../../../../org/apache/commons/math3/optimization/PointVectorValuePair.html" title="class in org.apache.commons.math3.optimization">PointVectorValuePair</a>&nbsp;optimizeInternal(int&nbsp;maxEval,
                                                <a href="../../../../../../org/apache/commons/math3/analysis/differentiation/MultivariateDifferentiableVectorFunction.html" title="interface in org.apache.commons.math3.analysis.differentiation">MultivariateDifferentiableVectorFunction</a>&nbsp;f,
                                                <a href="../../../../../../org/apache/commons/math3/optimization/OptimizationData.html" title="interface in org.apache.commons.math3.optimization">OptimizationData</a>...&nbsp;optData)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;<i>As of 3.1. Override is necessary only until this class's generic
  argument is changed to <code>MultivariateDifferentiableVectorFunction</code>.</i></div>
 <div class="block">Optimize an objective function.
  Optimization is considered to be a weighted least-squares minimization.
  The cost function to be minimized is
  <code>&sum;weight<sub>i</sub>(objective<sub>i</sub> - target<sub>i</sub>)<sup>2</sup></code></div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>maxEval</code> - Allowed number of evaluations of the objective function.</dd><dd><code>f</code> - Objective function.</dd><dd><code>optData</code> - Optimization data. The following data will be looked for:
  <ul>
   <li><a href="../../../../../../org/apache/commons/math3/optimization/Target.html" title="class in org.apache.commons.math3.optimization"><code>Target</code></a></li>
   <li><a href="../../../../../../org/apache/commons/math3/optimization/Weight.html" title="class in org.apache.commons.math3.optimization"><code>Weight</code></a></li>
   <li><a href="../../../../../../org/apache/commons/math3/optimization/InitialGuess.html" title="class in org.apache.commons.math3.optimization"><code>InitialGuess</code></a></li>
  </ul></dd>
 <dt><span class="strong">Returns:</span></dt><dd>the point/value pair giving the optimal value of the objective
  function.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/TooManyEvaluationsException.html" title="class in org.apache.commons.math3.exception">TooManyEvaluationsException</a></code> - if
  the maximal number of evaluations is exceeded.</dd>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if the target, and weight arguments
  have inconsistent dimensions.</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd>
 <dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimizeInternal(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)"><code>BaseAbstractMultivariateVectorOptimizer.optimizeInternal(int,
  org.apache.commons.math3.analysis.MultivariateVectorFunction,OptimizationData[])</code></a></dd></dl>
 </li>
 </ul>
 <a name="setUp()">
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 <h4>setUp</h4>
 <pre>protected&nbsp;void&nbsp;setUp()</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Method which a subclass <em>must</em> override whenever its internal
  state depend on the <a href="../../../../../../org/apache/commons/math3/optimization/OptimizationData.html" title="interface in org.apache.commons.math3.optimization"><code>input</code></a> parsed by this base
  class.
  It will be called after the parsing step performed in the
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#optimize(int, FUNC, org.apache.commons.math3.optimization.OptimizationData...)"><code>optimize</code></a> method and just before <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#doOptimize()"><code>BaseAbstractMultivariateVectorOptimizer.doOptimize()</code></a>.</div>
 <dl>
 <dt><strong>Overrides:</strong></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#setUp()">setUp</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html" title="class in org.apache.commons.math3.optimization.direct">BaseAbstractMultivariateVectorOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/analysis/DifferentiableMultivariateVectorFunction.html" title="interface in org.apache.commons.math3.analysis">DifferentiableMultivariateVectorFunction</a>&gt;</code></dd>
 </dl>
 </li>
 </ul>
 <a name="computeResiduals(double[])">
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 <ul class="blockListLast">
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 <h4>computeResiduals</h4>
 <pre>protected&nbsp;double[]&nbsp;computeResiduals(double[]&nbsp;objectiveValue)</pre>
 <div class="block"><span class="strong">Deprecated.</span>&nbsp;</div>
 <div class="block">Computes the residuals.
  The residual is the difference between the observed (target)
  values and the model (objective function) value.
  There is one residual for each element of the vector-valued
  function.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>objectiveValue</code> - Value of the the objective function. This is
  the value returned from a call to
  <a href="../../../../../../org/apache/commons/math3/optimization/direct/BaseAbstractMultivariateVectorOptimizer.html#computeObjectiveValue(double[])"><code>computeObjectiveValue</code></a>
  (whose array argument contains the model parameters).</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the residuals.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a></code> - if <code>params</code> has a wrong
  length.</dd><dt><span class="strong">Since:</span></dt>
   <dd>3.1</dd></dl>
 </li>
 </ul>
 </li>
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