org.encog.util
Class EngineArray

java.lang.Object
  org.encog.util.EngineArray

public final class EngineArray
extends Object

Some array functions used by Encog.

Method Summary

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 boolean	contains(int[] array, int target)
static Double[]	doubleToObject(double[] array) Convert an array of double primitives to Double objects.
static void	fill(double[] array, double value) Fill a double array.
static void	fill(float[] array, float value) Fill a float array.
static int	findStringInArray(String[] search, String searchFor) Search for a string in an array.
static int	indexOfLargest(double[] data)
static double[]	listToDouble(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(int[] data)
static double	min(double[] weights)
static int	min(int[] data)
static double[]	objectToDouble(Double[] array) Convert an array of Double objects to double primitives.
static double	sdev(int[] data)
static double	vectorProduct(double[] a, double[] b) Calculate the product of two vectors (a scalar value).

Methods inherited from class java.lang.Object

clone, equals, finalize, 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 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 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(String[] search,
                                    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(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(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)