Examples of TTestImpl

org.apache.commons.math.stat.inference.TTestImpl
Implements t-test statistics defined in the {@link TTest} interface.
Uses commons-math {@link org.apache.commons.math.distribution.TDistributionImpl}implementation to estimate exact p-values.
@version $Revision: 1042336 $ $Date: 2010-12-05 13:40:48 +0100 (dim. 05 déc. 2010) $

Examples of org.apache.commons.math.stat.inference.TTestImpl

    double s1[] = makeT(sample1);
    double s2[] = makeT(sample2);
    //for(int i = 0; i < s1.length; i++) System.err.println("s1[" + i + "] = " + s1[i]);
    //for(int i = 0; i < s2.length; i++) System.err.println("s2[" + i + "] = " + s2[i]);
    try {
      double r = new TTestImpl().tTest(s1, s2);
      //System.err.println("r = " + r);
      return values.real(r);
    } catch (IllegalArgumentException e) {
      throw RuntimeExceptionFactory.illegalArgument(sample1, null, null, e.getMessage());
    } catch (MathException e) {

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Examples of org.apache.commons.math.stat.inference.TTestImpl

  
  public IValue tTest(IList sample1, IList sample2, INumber alpha){
    double s1[] = makeT(sample1);
    double s2[] = makeT(sample2);
    try {
      return values.bool(new TTestImpl().tTest(s1, s2, alpha.toReal().doubleValue()));
    } catch (IllegalArgumentException e) {
      throw RuntimeExceptionFactory.illegalArgument(sample1, null, null, e.getMessage());
    } catch (MathException e) {
      throw RuntimeExceptionFactory.illegalArgument(sample1, null, null, e.getMessage());
    }

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Examples of org.apache.commons.math.stat.inference.TTestImpl

  }
  
  public IValue tTest(INumber mu, IList sample, INumber alpha){
    double s[] = makeT(sample);
    try {
      return values.bool(new TTestImpl().tTest( mu.toReal().doubleValue(), s, alpha.toReal().doubleValue()));
    } catch (IllegalArgumentException e) {
      throw RuntimeExceptionFactory.illegalArgument(sample, null, null, e.getMessage());
    } catch (MathException e) {
      throw RuntimeExceptionFactory.illegalArgument(sample, null, null, e.getMessage());
    }

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Examples of org.apache.commons.math.stat.inference.TTestImpl

    return dataMatrix;
  }


  private String getPvalue(DescriptiveStatistics group1,
      DescriptiveStatistics group2) {
    TTestImpl ttest = new TTestImpl();
    String sig = "";
    try {
      double pValue = ttest.tTest(group1, group2);
      if (pValue < 0.05) {
        sig = "*";
      }
      if (pValue < 0.01) {
        sig = "**";

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