org.encog.util

Class EngineArray

java.lang.Object

org.encog.util.EngineArray

public final class EngineArray
extends java.lang.Object

Some array functions used by Encog.

Method Summary

Modifier and Type	Method and Description
static double[]	add(double[] d, double[] m)
static void	arrayAdd(double[][] target, double[][] h)
static byte[]	arrayCopy(byte[] input) Copy a byte array.
static void	arrayCopy(byte[] source, int sourcePos, byte[] target, int targetPos, int length)
static double[]	arrayCopy(double[] input) Copy a double array.
static double[][]	arrayCopy(double[][] source) Copy a 2D double array.
static void	arrayCopy(double[] src, double[] dst) Completely copy one array into another.
static void	arrayCopy(double[] source, float[] target) Copy an array of floats to an array of doubles.
static void	arrayCopy(double[] source, int sourcePos, double[] target, int targetPos, int length) Copy an array of doubles.
static void	arrayCopy(float[] source, double[] target) Copy an array of floats to an array of doubles.
static int[]	arrayCopy(int[] input) Copy an int array.
static void	arrayCopy(int[] src, int[] dst) Completely copy one array into another.
static void	arrayCopy(int[] source, int sourcePos, int[] target, int targetPos, int length)
static boolean	contains(int[] array, int target)
static java.lang.Double[]	doubleToObject(double[] array) Convert an array of double primitives to Double objects.
static double	euclideanDistance(double[] p1, double[] p2)
static void	fill(boolean[] a, boolean b)
static void	fill(double[][] sigma, int value)
static void	fill(double[] array, double value) Fill a double array.
static void	fill(float[] array, float value) Fill a float array.
static void	fill(int[] a, int value)
static int	findStringInArray(java.lang.String[] search, java.lang.String searchFor) Search for a string in an array.
static int	indexOfLargest(double[] data)
static java.lang.String	list2string(java.util.List<java.lang.String> list)
static double[]	listToDouble(java.util.Collection<?> list) Convert the collection to an array list of doubles.
static double	max(double[] weights)
static int	max(int[] data)
static int	maxIndex(double[] data)
static int	maxIndex(int[] data)
static double	mean(double[] data)
static double	mean(int[] data)
static double	min(double[] weights)
static int	min(int[] data)
static double[]	objectToDouble(java.lang.Double[] array) Convert an array of Double objects to double primitives.
static java.lang.String	replace(java.lang.String str, java.lang.String searchFor, java.lang.String replace)
static double	sdev(int[] data)
static java.util.List<java.lang.String>	string2list(java.lang.String str)
static double[]	subtract(double[] a, double[] b)
static double	vectorProduct(double[] a, double[] b) Calculate the product of two vectors (a scalar value).

Methods inherited from class java.lang.Object

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

Method Detail

arrayCopy

public static double[] arrayCopy(double[] input)

Copy a double array.

Parameters:

input - The array to copy.

Returns:

The result of the copy.

arrayCopy

public static byte[] arrayCopy(byte[] input)

Copy a byte array.

Parameters:

input - The array to copy.

Returns:

The result of the copy.

arrayCopy

public static void arrayCopy(double[] src,
                             double[] dst)

Completely copy one array into another.

Parameters:

src - Source array.

dst - Destination array.

arrayCopy

public static void arrayCopy(double[] source,
                             float[] target)

Copy an array of floats to an array of doubles.

Parameters:

source - The source array.

target - The target array.

arrayCopy

public static void arrayCopy(double[] source,
                             int sourcePos,
                             double[] target,
                             int targetPos,
                             int length)

Copy an array of doubles.

Parameters:

source - The source.

sourcePos - The source index.

target - The target.

targetPos - The target index.

length - The length.

arrayCopy

public static double[][] arrayCopy(double[][] source)

Copy a 2D double array.

Parameters:

source - The source.

Returns:

The copied array.

arrayCopy

public static void arrayCopy(float[] source,
                             double[] target)

Copy an array of floats to an array of doubles.

Parameters:

source - The source array.

target - The target array.

arrayCopy

public static int[] arrayCopy(int[] input)

Copy an int array.

Parameters:

input - The array to copy.

Returns:

The result of the copy.

arrayCopy

public static void arrayCopy(int[] src,
                             int[] dst)

Completely copy one array into another.

Parameters:

src - Source array.

dst - Destination array.

doubleToObject

public static java.lang.Double[] doubleToObject(double[] array)

Convert an array of double primitives to Double objects.

Parameters:

array - The primitive array.

Returns:

The object array.

fill

public static void fill(double[] array,
                        double value)

Fill a double array.

Parameters:

array - The array to fill.

value - What to fill the array with.

fill

public static void fill(float[] array,
                        float value)

Fill a float array.

Parameters:

array - The array to fill.

value - What to fill the array with.

findStringInArray

public static int findStringInArray(java.lang.String[] search,
                                    java.lang.String searchFor)

Search for a string in an array.

Parameters:

search - Where to search.

searchFor - What we are looking for.

Returns:

The index that the string occurs at.

listToDouble

public static double[] listToDouble(java.util.Collection<?> list)

Convert the collection to an array list of doubles.

Parameters:

list - The list to convert.

Returns:

The array of doubles.

objectToDouble

public static double[] objectToDouble(java.lang.Double[] array)

Convert an array of Double objects to double primitives.

Parameters:

array - An array of Double objects.

Returns:

An array of double primitives.

vectorProduct

public static double vectorProduct(double[] a,
                                   double[] b)

Calculate the product of two vectors (a scalar value).

Parameters:

a - First vector to multiply.

b - Second vector to multiply.

Returns:

The product of the two vectors (a scalar value).

indexOfLargest

public static int indexOfLargest(double[] data)

min

public static double min(double[] weights)

max

public static double max(double[] weights)

contains

public static boolean contains(int[] array,
                               int target)

maxIndex

public static int maxIndex(double[] data)

maxIndex

public static int maxIndex(int[] data)

max

public static int max(int[] data)

min

public static int min(int[] data)

mean

public static double mean(int[] data)

sdev

public static double sdev(int[] data)

euclideanDistance

public static double euclideanDistance(double[] p1,
                                       double[] p2)

fill

public static void fill(double[][] sigma,
                        int value)

fill

public static void fill(boolean[] a,
                        boolean b)

add

public static double[] add(double[] d,
                           double[] m)

subtract

public static double[] subtract(double[] a,
                                double[] b)

mean

public static double mean(double[] data)

fill

public static void fill(int[] a,
                        int value)

replace

public static java.lang.String replace(java.lang.String str,
                                       java.lang.String searchFor,
                                       java.lang.String replace)

arrayCopy

public static void arrayCopy(byte[] source,
                             int sourcePos,
                             byte[] target,
                             int targetPos,
                             int length)

arrayCopy

public static void arrayCopy(int[] source,
                             int sourcePos,
                             int[] target,
                             int targetPos,
                             int length)

arrayAdd

public static void arrayAdd(double[][] target,
                            double[][] h)

string2list

public static java.util.List<java.lang.String> string2list(java.lang.String str)

list2string

public static java.lang.String list2string(java.util.List<java.lang.String> list)