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Diffstat (limited to 'test/de/lmu/ifi/dbs/elki/math/statistics/distribution/AbstractDistributionTest.java')
| -rw-r--r-- | test/de/lmu/ifi/dbs/elki/math/statistics/distribution/AbstractDistributionTest.java | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/test/de/lmu/ifi/dbs/elki/math/statistics/distribution/AbstractDistributionTest.java b/test/de/lmu/ifi/dbs/elki/math/statistics/distribution/AbstractDistributionTest.java new file mode 100644 index 00000000..fd975c15 --- /dev/null +++ b/test/de/lmu/ifi/dbs/elki/math/statistics/distribution/AbstractDistributionTest.java @@ -0,0 +1,77 @@ +package de.lmu.ifi.dbs.elki.math.statistics.distribution; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertTrue; + +/** + * Abstract base class for distribution unit testing. + * + * @author Erich Schubert + */ +public class AbstractDistributionTest { + public void checkPDF(Distribution d, double[] x, double[] expected, double err) { + int maxerrlev = Integer.MIN_VALUE; + for(int i = 0; i < x.length; i++) { + double val = d.pdf(x[i]); + if(val == expected[i]) { + continue; + } + double diff = Math.abs(val - expected[i]); + final int errlev = (int) Math.ceil(Math.log10(diff / expected[i])); + maxerrlev = Math.max(errlev, maxerrlev); + if(diff < err || diff / expected[i] < err) { + continue; + } + assertEquals("Error magnitude: 1e" + errlev + " at " + x[i], expected[i], val, err); + } + int given = (int) Math.floor(Math.log10(err * 1.1)); + // if (given > maxerrlev) { + // System.err.println("PDF Error for "+d+" magnitude is not tight: expected "+maxerrlev+" got "+given); + // } + assertTrue("Error magnitude is not tight: expected " + maxerrlev + " got " + given, given <= maxerrlev); + } + + public void checkCDF(Distribution d, double[] x, double[] expected, double err) { + int maxerrlev = Integer.MIN_VALUE; + for(int i = 0; i < x.length; i++) { + double val = d.cdf(x[i]); + if(val == expected[i]) { + continue; + } + double diff = Math.abs(val - expected[i]); + final int errlev = (int) Math.ceil(Math.log10(diff / expected[i])); + maxerrlev = Math.max(errlev, maxerrlev); + if(diff < err || diff / expected[i] < err) { + continue; + } + assertEquals("Error magnitude: 1e" + errlev + " at " + x[i], expected[i], val, err); + } + int given = (int) Math.floor(Math.log10(err * 1.1)); + // if (given > maxerrlev) { + // System.err.println("CDF Error for "+d+" magnitude is not tight: expected "+maxerrlev+" got "+given); + // } + assertTrue("Error magnitude is not tight: expected " + maxerrlev + " got " + given, given <= maxerrlev); + } + + public void checkQuantile(Distribution d, double[] x, double[] expected, double err) { + int maxerrlev = Integer.MIN_VALUE; + for(int i = 0; i < x.length; i++) { + double val = d.quantile(x[i]); + if(val == expected[i]) { + continue; + } + double diff = Math.abs(val - expected[i]); + final int errlev = (int) Math.ceil(Math.log10(diff / expected[i])); + maxerrlev = Math.max(errlev, maxerrlev); + if(diff < err || diff / expected[i] < err) { + continue; + } + assertEquals("Error magnitude: 1e" + errlev + " at " + x[i], expected[i], val, err); + } + int given = (int) Math.floor(Math.log10(err * 1.1)); + // if (given > maxerrlev) { + // System.err.println("Probit Error for "+d+" magnitude is not tight: expected "+maxerrlev+" got "+given); + // } + assertTrue("Error magnitude is not tight: expected " + maxerrlev + " got " + given, given <= maxerrlev); + } +}
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