Class Statistics

java.lang.Object

Statistics

public class Statistics
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
Statistics()

Method Summary

Modifier and Type	Method and Description
static double	getMax(double[] data) Return the maximum value from the given data array.
static double	getMean(double[] data) Get the mean (average) of the values in the given data array.
static double	getMin(double[] data) Return the minimum value from the given data array.
static double	getPercentile(double[] data, double percentile) Given a sorted data array and a percentile, return the approximate percentile value from that sorted array.
static double[]	getResample(double[] data) Return a new single array of data resampled from the given data array.
static double[]	getResampleMeanPercentiles(double[] data, int numResamples, double... percentiles) Given a data array and a specified number of resamples, return the given percentiles values for the resample means.
static double[]	getSortedResampleMeans(double[] data, int numResamples) Compute the given number of resamples from the given data array, and return a sorted list of the means of each resample.
static double	getStdDev(double[] data) Return the population standard deviation of the data.
static double	getSum(double[] data) Get the sum of the values in the given data array.
static void	main(java.lang.String[] args)

Methods inherited from class java.lang.Object

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

Constructor Detail

Statistics

public Statistics()

Method Detail

getMin

public static double getMin(double[] data)

Return the minimum value from the given data array.

Parameters:

data - data array

Returns:

the minimum value in the data array

getMax

public static double getMax(double[] data)

Return the maximum value from the given data array.

Parameters:

data - data array

Returns:

the maximum value in the data array

getSum

public static double getSum(double[] data)

Get the sum of the values in the given data array.

Parameters:

data - data array

Returns:

the sum of the values in the given data array

getMean

public static double getMean(double[] data)

Get the mean (average) of the values in the given data array.

Parameters:

data - data array

Returns:

the mean of the values in the given data array

getStdDev

public static double getStdDev(double[] data)

Return the population standard deviation of the data. (See https://en.wikipedia.org/wiki/Standard_deviation.)

Parameters:

data - given data array

Returns:

population standard deviation of the data.

getResample

public static double[] getResample(double[] data)

Return a new single array of data resampled from the given data array. The resampled array is of the same length as the given data array. Each resampled element is taken from a random index of the original array, so repetition/omission in resampling is expected.

Parameters:

data - given data array

Returns:

a new resampled data array with random elements chosen from the given data array (with potential repetitions/omissions) and having the same length

getSortedResampleMeans

public static double[] getSortedResampleMeans(double[] data,
                                              int numResamples)

Compute the given number of resamples from the given data array, and return a sorted list of the means of each resample.

Parameters:

data - given data array

numResamples - number of resamples computed from the given data array

Returns:

an array of length numResamples containing a sorted list of means from each of the resamples

getPercentile

public static double getPercentile(double[] data,
                                   double percentile)

Given a sorted data array and a percentile, return the approximate percentile value from that sorted array.

Parameters:

data - sorted data array

percentile - percentile requested from data array

Returns:

data array entry that approximates the requested percentile value

getResampleMeanPercentiles

public static double[] getResampleMeanPercentiles(double[] data,
                                                  int numResamples,
                                                  double... percentiles)

Given a data array and a specified number of resamples, return the given percentiles values for the resample means.

Parameters:

data - source data array

numResamples - number of times to resample the array and compute the means

percentiles - given percentiles to compute from the sorted means

Returns:

an array of specified percentile values for the resample means

main

public static void main(java.lang.String[] args)