Examples of org.apache.commons.math.stat.descriptive.summary.Sum

Package org.apache.commons.math.stat.descriptive.summary

Examples of org.apache.commons.math.stat.descriptive.summary.Sum

org.apache.commons.math.stat.descriptive.summary.Sum
Returns the sum of the available values.
If there are no values in the dataset, or any of the values are NaN, then NaN is returned.

Note that this implementation is not synchronized. If multiple threads access an instance of this class concurrently, and at least one of the threads invokes the increment() or clear() method, it must be synchronized externally.
@version $Revision: 1006299 $ $Date: 2010-10-10 16:47:17 +0200 (dim. 10 oct. 2010) $

     * @throws IllegalArgumentException if the array is null or the array index
     *  parameters are not valid
     */
    public double evaluate(final double[] values,final int begin, final int length) {
        if (test(values, begin, length)) {
            Sum sum = new Sum();
            double sampleSize = (double) length;
            
            // Compute initial estimate using definitional formula
            double xbar = sum.evaluate(values, begin, length) / sampleSize;
            
            // Compute correction factor in second pass
            double correction = 0;
            for (int i = begin; i < begin + length; i++) {
                correction += (values[i] - xbar);

View Full Code Here

        sumLogImpl  = new StorelessUnivariateStatistic[k];
        geoMeanImpl = new StorelessUnivariateStatistic[k];
        meanImpl    = new StorelessUnivariateStatistic[k];


        for (int i = 0; i < k; ++i) {
            sumImpl[i]     = new Sum();
            sumSqImpl[i]   = new SumOfSquares();
            minImpl[i]     = new Min();
            maxImpl[i]     = new Max();
            sumLogImpl[i]  = new SumOfLogs();
            geoMeanImpl[i] = new GeometricMean();

View Full Code Here

0 1 2 3

TOP

Related Classes of org.apache.commons.math.stat.descriptive.summary.Sum

org.apache.accumulo.core.util.Stat

org.apache.commons.math.stat.descriptive.DescriptiveStatistics

org.apache.commons.math.stat.descriptive.moment.Mean

org.apache.commons.math.stat.descriptive.MultivariateSummaryStatistics

org.apache.commons.math.stat.descriptive.SummaryStatisticsImpl

org.apache.commons.math.stat.descriptive.SummaryStatisticsTest

org.apache.commons.math.stat.inference.OneWayAnovaImpl

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.