utils
Class ArrayUtilities

java.lang.Object
  utils.ArrayUtilities

public class ArrayUtilities
extends java.lang.Object

additional utility functions for operating with arrays

Constructor Summary

ArrayUtilities()

Method Summary

static java.lang.String	debug2DArray(double[][] array) get a debug string displaying two dimensional arrays
static java.lang.String	debug2DArray(float[][] array) get a debug string displaying two dimensional arrays
static java.lang.String	debug2DArray(int[][] array) get a debug string displaying two dimensional arrays
static float[][]	double2float(double[][] array) convert double[][] to float[][]
static void	fillWith(double[][] destination, double value) fill all indices in destination with the specified value
static double	getAverage(double[][] haystack) get the average of all elements in a two dimensional array.
static double	getMaximum(double[][] haystack) get the maximum entry of a twodimensional array.
static double	getMean(double[] haystack) get the mean value for the specified one-dimensional array
static double	getStd(double[] haystack) get the standard deviation of the specified array.
static void	multiArrayCopy(double[][] source, double[][] destination) copy a two-dimensional array into another array.
static void	multiArrayCopy(float[][] source, float[][] destination) copy a two-dimensional array into another array.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayUtilities

public ArrayUtilities()

Method Detail

double2float

public static float[][] double2float(double[][] array)

convert double[][] to float[][]

Parameters:

array -

Returns:

the input array, with all values converted to floats

debug2DArray

public static java.lang.String debug2DArray(double[][] array)

get a debug string displaying two dimensional arrays

Parameters:

array - the array to be displayed

Returns:

debug string

debug2DArray

public static java.lang.String debug2DArray(float[][] array)

get a debug string displaying two dimensional arrays

Parameters:

array - the array to be displayed

Returns:

debug string

debug2DArray

public static java.lang.String debug2DArray(int[][] array)

get a debug string displaying two dimensional arrays

Parameters:

array - - the array to be displayed

Returns:

debug string

fillWith

public static void fillWith(double[][] destination,
                            double value)

fill all indices in destination with the specified value

Parameters:

destination - - the array to be filled

value - - the value that should fill all indices in destination

multiArrayCopy

public static void multiArrayCopy(double[][] source,
                                  double[][] destination)

copy a two-dimensional array into another array.

Parameters:

source - - the array to be copied

destination - - the array where to copy

multiArrayCopy

public static void multiArrayCopy(float[][] source,
                                  float[][] destination)

copy a two-dimensional array into another array.

Parameters:

source - - the array to be copied

destination - - the array where to copy

getMaximum

public static double getMaximum(double[][] haystack)

get the maximum entry of a twodimensional array.

Parameters:

haystack - the array to be searched

Returns:

maximum entry in the specified array

getAverage

public static double getAverage(double[][] haystack)

get the average of all elements in a two dimensional array.

Parameters:

haystack - the array to get the average for

Returns:

average of all elements in haystack

getStd

public static double getStd(double[] haystack)

get the standard deviation of the specified array.

Parameters:

haystack - the array to get the sd for

Returns:

standard deviation for the specified array.

getMean

public static double getMean(double[] haystack)

get the mean value for the specified one-dimensional array

Parameters:

haystack - the array to get the mean for

Returns:

mean for haystack