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Unit test.

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git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1349707 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Gilles Sadowski 2012-06-13 09:30:56 +00:00
parent 07d05a070c
commit 31217dfcb2
1 changed files with 29 additions and 0 deletions
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29
src/test/java/org/apache/commons/math3/optimization/fitting/GaussianFitterTest.java
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@ -315,6 +315,35 @@ public class GaussianFitterTest {
Assert.assertEquals(53.1572792, p[1], 1e-7);
Assert.assertEquals(5.75214622, p[2], 1e-8);
}
@Test
public void testMath798() {
final GaussianFitter fitter = new GaussianFitter(new LevenbergMarquardtOptimizer());
// When the data points are not commented out below, the fit stalls.
// This is expected however, since the whole dataset hardly looks like
// a Gaussian.
// When commented out, the fit proceeds fine.
fitter.addObservedPoint(0.23, 395.0);
//fitter.addObservedPoint(0.68, 0.0);
fitter.addObservedPoint(1.14, 376.0);
//fitter.addObservedPoint(1.59, 0.0);
fitter.addObservedPoint(2.05, 163.0);
//fitter.addObservedPoint(2.50, 0.0);
fitter.addObservedPoint(2.95, 49.0);
//fitter.addObservedPoint(3.41, 0.0);
fitter.addObservedPoint(3.86, 16.0);
//fitter.addObservedPoint(4.32, 0.0);
fitter.addObservedPoint(4.77, 1.0);
final double[] p = fitter.fit();
// Values are copied from a previous run of this test.
Assert.assertEquals(420.8397296167364, p[0], 1e-12);
Assert.assertEquals(0.603770729862231, p[1], 1e-15);
Assert.assertEquals(1.0786447936766612, p[2], 1e-14);
}
/**
* Adds the specified points to specified <code>GaussianFitter</code>