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<div class="subTitle">org.apache.commons.math3.analysis.interpolation</div>
<h2 title="Class AkimaSplineInterpolator" class="title">Class AkimaSplineInterpolator</h2>
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<pre>public class <span class="strong">AkimaSplineInterpolator</span>
extends <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../../../org/apache/commons/math3/analysis/interpolation/UnivariateInterpolator.html" title="interface in org.apache.commons.math3.analysis.interpolation">UnivariateInterpolator</a></pre>
<div class="block">Computes a cubic spline interpolation for the data set using the Akima
algorithm, as originally formulated by Hiroshi Akima in his 1970 paper
"A New Method of Interpolation and Smooth Curve Fitting Based on Local Procedures."
J. ACM 17, 4 (October 1970), 589-602. DOI=10.1145/321607.321609
http://doi.acm.org/10.1145/321607.321609
<p>
This implementation is based on the Akima implementation in the CubicSpline
class in the Math.NET Numerics library. The method referenced is
CubicSpline.InterpolateAkimaSorted
</p>
<p>
The <a href="../../../../../../org/apache/commons/math3/analysis/interpolation/AkimaSplineInterpolator.html#interpolate(double[],%20double[])"><code>interpolate</code></a> method returns a
<a href="../../../../../../org/apache/commons/math3/analysis/polynomials/PolynomialSplineFunction.html" title="class in org.apache.commons.math3.analysis.polynomials"><code>PolynomialSplineFunction</code></a> consisting of n cubic polynomials, defined
over the subintervals determined by the x values, <code>x[0] < x[i] ... < x[n]</code>.
The Akima algorithm requires that <code>n >= 5</code>.
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<td class="colOne"><code><strong><a href="../../../../../../org/apache/commons/math3/analysis/interpolation/AkimaSplineInterpolator.html#AkimaSplineInterpolator()">AkimaSplineInterpolator</a></strong>()</code> </td>
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<td class="colFirst"><code><a href="../../../../../../org/apache/commons/math3/analysis/polynomials/PolynomialSplineFunction.html" title="class in org.apache.commons.math3.analysis.polynomials">PolynomialSplineFunction</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/analysis/interpolation/AkimaSplineInterpolator.html#interpolate(double[],%20double[])">interpolate</a></strong>(double[] xvals,
double[] yvals)</code>
<div class="block">Computes an interpolating function for the data set.</div>
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<h4>AkimaSplineInterpolator</h4>
<pre>public AkimaSplineInterpolator()</pre>
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<h4>interpolate</h4>
<pre>public <a href="../../../../../../org/apache/commons/math3/analysis/polynomials/PolynomialSplineFunction.html" title="class in org.apache.commons.math3.analysis.polynomials">PolynomialSplineFunction</a> interpolate(double[] xvals,
double[] yvals)
throws <a href="../../../../../../org/apache/commons/math3/exception/DimensionMismatchException.html" title="class in org.apache.commons.math3.exception">DimensionMismatchException</a>,
<a href="../../../../../../org/apache/commons/math3/exception/NumberIsTooSmallException.html" title="class in org.apache.commons.math3.exception">NumberIsTooSmallException</a>,
<a href="../../../../../../org/apache/commons/math3/exception/NonMonotonicSequenceException.html" title="class in org.apache.commons.math3.exception">NonMonotonicSequenceException</a></pre>
<div class="block">Computes an interpolating function for the data set.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/analysis/interpolation/UnivariateInterpolator.html#interpolate(double[],%20double[])">interpolate</a></code> in interface <code><a href="../../../../../../org/apache/commons/math3/analysis/interpolation/UnivariateInterpolator.html" title="interface in org.apache.commons.math3.analysis.interpolation">UnivariateInterpolator</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>xvals</code> - the arguments for the interpolation points</dd><dd><code>yvals</code> - the values for the interpolation points</dd>
<dt><span class="strong">Returns:</span></dt><dd>a function which interpolates the data set</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>xvals</code> and <code>yvals</code> have
different sizes.</dd>
<dd><code><a href="../../../../../../org/apache/commons/math3/exception/NonMonotonicSequenceException.html" title="class in org.apache.commons.math3.exception">NonMonotonicSequenceException</a></code> - if <code>xvals</code> is not sorted in
strict increasing order.</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 size of <code>xvals</code> is smaller
than 5.</dd></dl>
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