Google Git
Sign in
vanadium / third_party / f3f8ecf501af34dcff5dc09ab99fbc11aab47945 / . / java / commons-math3-3.3 / docs / apidocs / org / apache / commons / math3 / ode / SecondOrderDifferentialEquations.html
blob: 02bf3676fbd4e82f6333fe977bcf5b375b05382f [file] [log] [blame]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!-- NewPage -->
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html" charset="UTF-8">
<title>SecondOrderDifferentialEquations (Apache Commons Math 3.3 API)</title>
<link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style">
</head>
<body>
<script type="text/javascript"><!--
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="SecondOrderDifferentialEquations (Apache Commons Math 3.3 API)";
}
//-->
</script>
<noscript>
<div>JavaScript is disabled on your browser.</div>
</noscript>
<!-- ========= START OF TOP NAVBAR ======= -->
<div class="topNav"><a name="navbar_top">
<!-- -->
</a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">
<!-- -->
</a>
<ul class="navList" title="Navigation">
<li><a href="../../../../../overview-summary.html">Overview</a></li>
<li><a href="package-summary.html">Package</a></li>
<li class="navBarCell1Rev">Class</li>
<li><a href="class-use/SecondOrderDifferentialEquations.html">Use</a></li>
<li><a href="package-tree.html">Tree</a></li>
<li><a href="../../../../../deprecated-list.html">Deprecated</a></li>
<li><a href="../../../../../index-all.html">Index</a></li>
<li><a href="../../../../../help-doc.html">Help</a></li>
</ul>
<div class="aboutLanguage"><em><script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script></em></div>
</div>
<div class="subNav">
<ul class="navList">
<li><a href="../../../../../org/apache/commons/math3/ode/SecondaryEquations.html" title="interface in org.apache.commons.math3.ode"><span class="strong">Prev Class</span></a></li>
<li><a href="../../../../../org/apache/commons/math3/ode/SecondOrderIntegrator.html" title="interface in org.apache.commons.math3.ode"><span class="strong">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../../index.html?org/apache/commons/math3/ode/SecondOrderDifferentialEquations.html" target="_top">Frames</a></li>
<li><a href="SecondOrderDifferentialEquations.html" target="_top">No Frames</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_top">
<li><a href="../../../../../allclasses-noframe.html">All Classes</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_top");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary:&nbsp;</li>
<li>Nested&nbsp;|&nbsp;</li>
<li>Field&nbsp;|&nbsp;</li>
<li>Constr&nbsp;|&nbsp;</li>
<li><a href="#method_summary">Method</a></li>
</ul>
<ul class="subNavList">
<li>Detail:&nbsp;</li>
<li>Field&nbsp;|&nbsp;</li>
<li>Constr&nbsp;|&nbsp;</li>
<li><a href="#method_detail">Method</a></li>
</ul>
</div>
<a name="skip-navbar_top">
<!-- -->
</a></div>
<!-- ========= END OF TOP NAVBAR ========= -->
<!-- ======== START OF CLASS DATA ======== -->
<div class="header">
<div class="subTitle">org.apache.commons.math3.ode</div>
<h2 title="Interface SecondOrderDifferentialEquations" class="title">Interface SecondOrderDifferentialEquations</h2>
</div>
<div class="contentContainer">
<div class="description">
<ul class="blockList">
<li class="blockList">
<hr>
<br>
<pre>public interface <span class="strong">SecondOrderDifferentialEquations</span></pre>
<div class="block">This interface represents a second order differential equations set.
<p>This interface should be implemented by all real second order
differential equation problems before they can be handled by the
integrators <a href="../../../../../org/apache/commons/math3/ode/SecondOrderIntegrator.html#integrate(org.apache.commons.math3.ode.SecondOrderDifferentialEquations, double, double[], double[], double, double[], double[])"><code>SecondOrderIntegrator.integrate(org.apache.commons.math3.ode.SecondOrderDifferentialEquations, double, double[], double[], double, double[], double[])</code></a> method.</p>
<p>A second order differential equations problem, as seen by an
integrator is the second time derivative <code>d2Y/dt^2</code> of a
state vector <code>Y</code>, both being one dimensional
arrays. From the integrator point of view, this derivative depends
only on the current time <code>t</code>, on the state vector
<code>Y</code> and on the first time derivative of the state
vector.</p>
<p>For real problems, the derivative depends also on parameters
that do not belong to the state vector (dynamical model constants
for example). These constants are completely outside of the scope
of this interface, the classes that implement it are allowed to
handle them as they want.</p></div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>1.2</dd>
<dt><span class="strong">Version:</span></dt>
<dd>$Id: SecondOrderDifferentialEquations.java 1416643 2012-12-03 19:37:14Z tn $</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../org/apache/commons/math3/ode/SecondOrderIntegrator.html" title="interface in org.apache.commons.math3.ode"><code>SecondOrderIntegrator</code></a>,
<a href="../../../../../org/apache/commons/math3/ode/FirstOrderConverter.html" title="class in org.apache.commons.math3.ode"><code>FirstOrderConverter</code></a>,
<a href="../../../../../org/apache/commons/math3/ode/FirstOrderDifferentialEquations.html" title="interface in org.apache.commons.math3.ode"><code>FirstOrderDifferentialEquations</code></a></dd></dl>
</li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- ========== 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>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/ode/SecondOrderDifferentialEquations.html#computeSecondDerivatives(double, double[], double[], double[])">computeSecondDerivatives</a></strong>(double&nbsp;t,
double[]&nbsp;y,
double[]&nbsp;yDot,
double[]&nbsp;yDDot)</code>
<div class="block">Get the current time derivative of the state vector.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/ode/SecondOrderDifferentialEquations.html#getDimension()">getDimension</a></strong>()</code>
<div class="block">Get the dimension of the problem.</div>
</td>
</tr>
</table>
</li>
</ul>
</li>
</ul>
</div>
<div class="details">
<ul class="blockList">
<li class="blockList">
<!-- ============ METHOD DETAIL ========== -->
<ul class="blockList">
<li class="blockList"><a name="method_detail">
<!-- -->
</a>
<h3>Method Detail</h3>
<a name="getDimension()">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>getDimension</h4>
<pre>int&nbsp;getDimension()</pre>
<div class="block">Get the dimension of the problem.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>dimension of the problem</dd></dl>
</li>
</ul>
<a name="computeSecondDerivatives(double, double[], double[], double[])">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>computeSecondDerivatives</h4>
<pre>void&nbsp;computeSecondDerivatives(double&nbsp;t,
double[]&nbsp;y,
double[]&nbsp;yDot,
double[]&nbsp;yDDot)</pre>
<div class="block">Get the current time derivative of the state vector.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>t</code> - current value of the independent <I>time</I> variable</dd><dd><code>y</code> - array containing the current value of the state vector</dd><dd><code>yDot</code> - array containing the current value of the first derivative
of the state vector</dd><dd><code>yDDot</code> - placeholder array where to put the second time derivative
of the state vector</dd></dl>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
<!-- ========= END OF CLASS DATA ========= -->
<!-- ======= START OF BOTTOM NAVBAR ====== -->
<div class="bottomNav"><a name="navbar_bottom">
<!-- -->
</a><a href="#skip-navbar_bottom" title="Skip navigation links"></a><a name="navbar_bottom_firstrow">
<!-- -->
</a>
<ul class="navList" title="Navigation">
<li><a href="../../../../../overview-summary.html">Overview</a></li>
<li><a href="package-summary.html">Package</a></li>
<li class="navBarCell1Rev">Class</li>
<li><a href="class-use/SecondOrderDifferentialEquations.html">Use</a></li>
<li><a href="package-tree.html">Tree</a></li>
<li><a href="../../../../../deprecated-list.html">Deprecated</a></li>
<li><a href="../../../../../index-all.html">Index</a></li>
<li><a href="../../../../../help-doc.html">Help</a></li>
</ul>
<div class="aboutLanguage"><em><script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script></em></div>
</div>
<div class="subNav">
<ul class="navList">
<li><a href="../../../../../org/apache/commons/math3/ode/SecondaryEquations.html" title="interface in org.apache.commons.math3.ode"><span class="strong">Prev Class</span></a></li>
<li><a href="../../../../../org/apache/commons/math3/ode/SecondOrderIntegrator.html" title="interface in org.apache.commons.math3.ode"><span class="strong">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../../index.html?org/apache/commons/math3/ode/SecondOrderDifferentialEquations.html" target="_top">Frames</a></li>
<li><a href="SecondOrderDifferentialEquations.html" target="_top">No Frames</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_bottom">
<li><a href="../../../../../allclasses-noframe.html">All Classes</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_bottom");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary:&nbsp;</li>
<li>Nested&nbsp;|&nbsp;</li>
<li>Field&nbsp;|&nbsp;</li>
<li>Constr&nbsp;|&nbsp;</li>
<li><a href="#method_summary">Method</a></li>
</ul>
<ul class="subNavList">
<li>Detail:&nbsp;</li>
<li>Field&nbsp;|&nbsp;</li>
<li>Constr&nbsp;|&nbsp;</li>
<li><a href="#method_detail">Method</a></li>
</ul>
</div>
<a name="skip-navbar_bottom">
<!-- -->
</a></div>
<!-- ======== END OF BOTTOM NAVBAR ======= -->
<p class="legalCopy"><small>Copyright &#169; 2003&#x2013;2014 <a href="http://www.apache.org/">The Apache Software Foundation</a>. All rights reserved.</small></p>
</body>
</html>