com.rshtech.util
Class MathUtil

java.lang.Object
  com.rshtech.util.MathUtil

public class MathUtil
extends java.lang.Object

A set of utilities for performing standard mathematics and statistical operations on collections and arrays.

Version:

$Revision: 3129 $

Author:

$Author: kostya $

Field Summary

static java.util.Comparator<java.lang.Number>

NUMBER_COMPARATOR

Constructor Summary

MathUtil()

Method Summary

static double	get90thPercentile(java.util.Collection<? extends java.lang.Number> coll)
static double	get90thPercentile(double[] values)
static double	get90thPercentile(float[] values)
static double	get90thPercentile(int[] values)
static double	get90thPercentile(long[] values)
static double	get90thPercentile(java.lang.Number[] values)
static double	getMean(java.util.Collection<? extends java.lang.Number> coll)
static double	getMean(double[] values)
static double	getMean(float[] values)
static double	getMean(int[] values)
static double	getMean(long[] values)
static double	getMean(java.lang.Number[] values)
static double	getMedian(java.util.Collection<? extends java.lang.Number> coll)
static double	getMedian(double[] values)
static double	getMedian(float[] values)
static double	getMedian(int[] values)
static double	getMedian(long[] values)
static double	getMedian(java.lang.Number[] values)
static double	getPercentile(java.util.Collection<? extends java.lang.Number> coll, float percentile)
static double	getPercentile(double[] values, float percentile)
static double	getPercentile(float[] values, float percentile)
static double	getPercentile(int[] values, float percentile)
static double	getPercentile(long[] values, float percentile)
static double	getPercentile(java.lang.Number[] values, float percentile)
static double	getStandardDeviation(java.util.Collection<? extends java.lang.Number> coll)
static double	getStandardDeviation(double[] values)
static double	getStandardDeviation(float[] values)
static double	getStandardDeviation(int[] values)
static double	getStandardDeviation(long[] values)
static double	getStandardDeviation(java.lang.Number[] values)
static double	getTotal(java.util.Collection<? extends java.lang.Number> coll)
static double	getTotal(java.util.Collection<? extends java.lang.Number> coll, int fromIndex, int length)
static double	getTotal(double[] values)
static double	getTotal(double[] values, int fromIndex, int length)
static double	getTotal(float[] values)
static double	getTotal(float[] values, int fromIndex, int length)
static double	getTotal(int[] values)
static double	getTotal(int[] values, int fromIndex, int length)
static double	getTotal(long[] values)
static double	getTotal(long[] values, int fromIndex, int length)
static double	getTotal(java.lang.Number[] values)
static double	getTotal(java.lang.Number[] values, int fromIndex, int length)
static double	getTrimmedMean(java.util.Collection<? extends java.lang.Number> coll, float trim)
static double	getTrimmedMean(double[] values, float trim)
static double	getTrimmedMean(float[] values, float trim)
static double	getTrimmedMean(int[] values, float trim)
static double	getTrimmedMean(long[] values, float trim)
static double	getTrimmedMean(java.lang.Number[] values, float trim)
static double	roundDecimal(double d, int digits)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NUMBER_COMPARATOR

public static final java.util.Comparator<java.lang.Number> NUMBER_COMPARATOR

Constructor Detail

MathUtil

public MathUtil()

Method Detail

roundDecimal

public static double roundDecimal(double d,
                                  int digits)

getTotal

public static double getTotal(int[] values)

getTotal

public static double getTotal(int[] values,
                              int fromIndex,
                              int length)

getTotal

public static double getTotal(long[] values)

getTotal

public static double getTotal(long[] values,
                              int fromIndex,
                              int length)

getTotal

public static double getTotal(float[] values)

getTotal

public static double getTotal(float[] values,
                              int fromIndex,
                              int length)

getTotal

public static double getTotal(double[] values)

getTotal

public static double getTotal(double[] values,
                              int fromIndex,
                              int length)

getTotal

public static double getTotal(java.lang.Number[] values)

getTotal

public static double getTotal(java.lang.Number[] values,
                              int fromIndex,
                              int length)

getTotal

public static double getTotal(java.util.Collection<? extends java.lang.Number> coll)

getTotal

public static double getTotal(java.util.Collection<? extends java.lang.Number> coll,
                              int fromIndex,
                              int length)

getMean

public static double getMean(int[] values)

getMean

public static double getMean(long[] values)

getMean

public static double getMean(float[] values)

getMean

public static double getMean(double[] values)

getMean

public static double getMean(java.lang.Number[] values)

getMean

public static double getMean(java.util.Collection<? extends java.lang.Number> coll)

getTrimmedMean

public static double getTrimmedMean(int[] values,
                                    float trim)

getTrimmedMean

public static double getTrimmedMean(long[] values,
                                    float trim)

getTrimmedMean

public static double getTrimmedMean(float[] values,
                                    float trim)

getTrimmedMean

public static double getTrimmedMean(double[] values,
                                    float trim)

getTrimmedMean

public static double getTrimmedMean(java.lang.Number[] values,
                                    float trim)

getTrimmedMean

public static double getTrimmedMean(java.util.Collection<? extends java.lang.Number> coll,
                                    float trim)

getMedian

public static double getMedian(int[] values)

get90thPercentile

public static double get90thPercentile(int[] values)

getPercentile

public static double getPercentile(int[] values,
                                   float percentile)

getMedian

public static double getMedian(long[] values)

get90thPercentile

public static double get90thPercentile(long[] values)

getPercentile

public static double getPercentile(long[] values,
                                   float percentile)

getMedian

public static double getMedian(float[] values)

get90thPercentile

public static double get90thPercentile(float[] values)

getPercentile

public static double getPercentile(float[] values,
                                   float percentile)

getMedian

public static double getMedian(double[] values)

get90thPercentile

public static double get90thPercentile(double[] values)

getPercentile

public static double getPercentile(double[] values,
                                   float percentile)

getMedian

public static double getMedian(java.lang.Number[] values)

get90thPercentile

public static double get90thPercentile(java.lang.Number[] values)

getPercentile

public static double getPercentile(java.lang.Number[] values,
                                   float percentile)

getMedian

public static double getMedian(java.util.Collection<? extends java.lang.Number> coll)

get90thPercentile

public static double get90thPercentile(java.util.Collection<? extends java.lang.Number> coll)

getPercentile

public static double getPercentile(java.util.Collection<? extends java.lang.Number> coll,
                                   float percentile)

getStandardDeviation

public static double getStandardDeviation(int[] values)

getStandardDeviation

public static double getStandardDeviation(long[] values)

getStandardDeviation

public static double getStandardDeviation(float[] values)

getStandardDeviation

public static double getStandardDeviation(double[] values)

getStandardDeviation

public static double getStandardDeviation(java.lang.Number[] values)

getStandardDeviation

public static double getStandardDeviation(java.util.Collection<? extends java.lang.Number> coll)