Examples of org.apache.commons.math.stat.StorelessDescriptiveStatisticsImpl.addValue()

Class org.apache.commons.math.stat.StorelessDescriptiveStatisticsImpl

Examples of org.apache.commons.math.stat.StorelessDescriptiveStatisticsImpl.addValue()

org.apache.commons.math.stat.StorelessDescriptiveStatisticsImpl.addValue()
pss.com/tech/stat/Algorithms/11.5/descriptives.pdf"> recursive strategy . Otherwise, stat methods delegate to StatUtils. @see org.apache.commons.math.stat.Univariate#addValue(double)

    public void testProductAndGeometricMean() throws Exception {
      StorelessDescriptiveStatisticsImpl u = new StorelessDescriptiveStatisticsImpl(10);
            
        u.addValue( 1.0 );
        u.addValue( 2.0 );
        u.addValue( 3.0 );
        u.addValue( 4.0 );


        assertEquals( "Geometric mean not expected", 2.213364, 
            u.getGeometricMean(), 0.00001 );

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      StorelessDescriptiveStatisticsImpl u = new StorelessDescriptiveStatisticsImpl(10);
            
        u.addValue( 1.0 );
        u.addValue( 2.0 );
        u.addValue( 3.0 );
        u.addValue( 4.0 );


        assertEquals( "Geometric mean not expected", 2.213364, 
            u.getGeometricMean(), 0.00001 );


        // Now test rolling - StorelessDescriptiveStatistics should discount the contribution

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            u.getGeometricMean(), 0.00001 );


        // Now test rolling - StorelessDescriptiveStatistics should discount the contribution
        // of a discarded element
        for( int i = 0; i < 10; i++ ) {
            u.addValue( i + 2 );
        }
        // Values should be (2,3,4,5,6,7,8,9,10,11)
        
        assertEquals( "Geometric mean not expected", 5.755931, 
            u.getGeometricMean(), 0.00001 );

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            u.getGeometricMean(), 0.00001 );
    }
    
    public void testRollingMinMax() {
        StorelessDescriptiveStatisticsImpl u = new StorelessDescriptiveStatisticsImpl(3);
        u.addValue( 1.0 );
        u.addValue( 5.0 );
        u.addValue( 3.0 );
        u.addValue( 4.0 ); // discarding min
        assertEquals( "min not expected", 3.0, 
            u.getMin(), Double.MIN_VALUE);

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    }
    
    public void testRollingMinMax() {
        StorelessDescriptiveStatisticsImpl u = new StorelessDescriptiveStatisticsImpl(3);
        u.addValue( 1.0 );
        u.addValue( 5.0 );
        u.addValue( 3.0 );
        u.addValue( 4.0 ); // discarding min
        assertEquals( "min not expected", 3.0, 
            u.getMin(), Double.MIN_VALUE);
        u.addValue(1.0);  // discarding max

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    public void testRollingMinMax() {
        StorelessDescriptiveStatisticsImpl u = new StorelessDescriptiveStatisticsImpl(3);
        u.addValue( 1.0 );
        u.addValue( 5.0 );
        u.addValue( 3.0 );
        u.addValue( 4.0 ); // discarding min
        assertEquals( "min not expected", 3.0, 
            u.getMin(), Double.MIN_VALUE);
        u.addValue(1.0);  // discarding max
        assertEquals( "max not expected", 4.0,

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    public void testRollingMinMax() {
        StorelessDescriptiveStatisticsImpl u = new StorelessDescriptiveStatisticsImpl(3);
        u.addValue( 1.0 );
        u.addValue( 5.0 );
        u.addValue( 3.0 );
        u.addValue( 4.0 ); // discarding min
        assertEquals( "min not expected", 3.0, 
            u.getMin(), Double.MIN_VALUE);
        u.addValue(1.0);  // discarding max
        assertEquals( "max not expected", 4.0, 
            u.getMax(), Double.MIN_VALUE);

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        u.addValue( 5.0 );
        u.addValue( 3.0 );
        u.addValue( 4.0 ); // discarding min
        assertEquals( "min not expected", 3.0, 
            u.getMin(), Double.MIN_VALUE);
        u.addValue(1.0);  // discarding max
        assertEquals( "max not expected", 4.0, 
            u.getMax(), Double.MIN_VALUE);
    }
    
    public void testNaNContracts() {

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        assertTrue("min not NaN",Double.isNaN(u.getMin())); 
        assertTrue("std dev not NaN",Double.isNaN(u.getStandardDeviation())); 
        assertTrue("var not NaN",Double.isNaN(u.getVariance())); 
        assertTrue("geom mean not NaN",Double.isNaN(u.getGeometricMean()));
        
        u.addValue(1.0);
        
        assertEquals( "mean not expected", 1.0, 
            u.getMean(), Double.MIN_VALUE);
        assertEquals( "variance not expected", 0.0, 
            u.getVariance(), Double.MIN_VALUE);

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        assertEquals( "variance not expected", 0.0, 
            u.getVariance(), Double.MIN_VALUE);
        assertEquals( "geometric mean not expected", 1.0, 
            u.getGeometricMean(), Double.MIN_VALUE);
        
        u.addValue(-1.0);
        
        assertTrue("geom mean not NaN",Double.isNaN(u.getGeometricMean()));
        
        u.addValue(0.0);

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