mikera.vectorz.util

Class DoubleArrays

java.lang.Object

mikera.vectorz.util.DoubleArrays

public final class DoubleArrays
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static double[]	EMPTY

Constructor Summary

Constructors

Constructor and Description
DoubleArrays()

Method Summary

Methods

Modifier and Type	Method and Description
static void	abs(double[] data)
static void	abs(double[] data, int offset, int length)
static void	add(double[] data, double value)
static void	add(double[] src, int srcOffset, double[] dest, int destOffset, int length)
static void	add(double[] data, int offset, int length, double value)
static void	addMultiple(double[] dest, int offset, double[] src, int srcOffset, int length, double factor)
static void	addProduct(double[] dest, int offset, double[] src1, int src1Offset, double[] src2, int src2Offset, int length, double factor)
static void	arraydivide(double[] src, int srcOffset, double[] dest, int destOffset, int length)
static void	arraymultiply(double[] src, int srcOffset, double[] dest, int destOffset, int length)
static void	clamp(double[] data, double min, double max)
static void	clamp(double[] data, int offset, int length, double min, double max)
static double[]	copyOf(double[] data) Fast double array copy operation.
static void	divide(double[] data, int offset, int length, double value)
static double	dotProduct(double[] a, int aOffset, double[] b, int bOffset, int length)
static double	elementSquaredSum(double[] data)
static double	elementSquaredSum(double[] data, int offset, int length)
static double	elementSum(double[] data)
static double	elementSum(double[] data, int offset, int length)
static boolean	equals(double[] as, double[] bs)
static boolean	equals(double[] as, int aOffset, double[] bs, int bOffset, int length)
static void	exp(double[] data)
static void	exp(double[] data, int offset, int length)
static boolean	isBoolean(double[] data)
static boolean	isBoolean(double[] data, int offset, int length)
static boolean	isZero(double[] data)
static boolean	isZero(double[] data, int offset, int length)
static void	log(double[] data)
static void	log(double[] data, int offset, int length)
static void	logistic(double[] ds)
static void	logistic(double[] ds, int offset, int length)
static void	multiply(double[] data, double value)
static void	multiply(double[] data, int offset, int length, double value)
static void	negate(double[] data)
static void	negate(double[] data, int offset, int length)
static int	nonZeroCount(double[] data)
static int	nonZeroCount(double[] data, int offset, int length)
static void	pow(double[] data, double exponent)
static void	pow(double[] data, int offset, int length, double exponent)
static void	reciprocal(double[] data)
static void	reciprocal(double[] data, int offset, int length)
static void	scaleAdd(double[] data, double factor, double constant)
static void	scaleAdd(double[] data, int offset, int length, double factor, double constant)
static void	signum(double[] ds)
static void	signum(double[] ds, int offset, int length)
static void	sqrt(double[] data, int offset, int length)
static void	square(double[] ds)
static void	square(double[] ds, int offset, int length)
static void	sub(double[] data, double value)
static void	sub(double[] data, int offset, int length, double value)
static void	tanh(double[] ds)
static void	tanh(double[] ds, int offset, int length)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final double[] EMPTY

Constructor Detail

DoubleArrays

public DoubleArrays()

Method Detail

elementSum

public static final double elementSum(double[] data)

elementSum

public static final double elementSum(double[] data,
                int offset,
                int length)

elementSquaredSum

public static double elementSquaredSum(double[] data)

elementSquaredSum

public static double elementSquaredSum(double[] data,
                       int offset,
                       int length)

nonZeroCount

public static int nonZeroCount(double[] data)

nonZeroCount

public static int nonZeroCount(double[] data,
               int offset,
               int length)

multiply

public static void multiply(double[] data,
            int offset,
            int length,
            double value)

multiply

public static void multiply(double[] data,
            double value)

square

public static void square(double[] ds)

square

public static void square(double[] ds,
          int offset,
          int length)

tanh

public static void tanh(double[] ds)

tanh

public static void tanh(double[] ds,
        int offset,
        int length)

logistic

public static void logistic(double[] ds)

logistic

public static void logistic(double[] ds,
            int offset,
            int length)

signum

public static void signum(double[] ds)

signum

public static void signum(double[] ds,
          int offset,
          int length)

divide

public static void divide(double[] data,
          int offset,
          int length,
          double value)

add

public static void add(double[] data,
       int offset,
       int length,
       double value)

add

public static void add(double[] data,
       double value)

addMultiple

public static void addMultiple(double[] dest,
               int offset,
               double[] src,
               int srcOffset,
               int length,
               double factor)

addProduct

public static void addProduct(double[] dest,
              int offset,
              double[] src1,
              int src1Offset,
              double[] src2,
              int src2Offset,
              int length,
              double factor)

sub

public static void sub(double[] data,
       double value)

sub

public static void sub(double[] data,
       int offset,
       int length,
       double value)

arraymultiply

public static void arraymultiply(double[] src,
                 int srcOffset,
                 double[] dest,
                 int destOffset,
                 int length)

arraydivide

public static void arraydivide(double[] src,
               int srcOffset,
               double[] dest,
               int destOffset,
               int length)

dotProduct

public static double dotProduct(double[] a,
                int aOffset,
                double[] b,
                int bOffset,
                int length)

add

public static void add(double[] src,
       int srcOffset,
       double[] dest,
       int destOffset,
       int length)

clamp

public static void clamp(double[] data,
         double min,
         double max)

clamp

public static void clamp(double[] data,
         int offset,
         int length,
         double min,
         double max)

pow

public static void pow(double[] data,
       double exponent)

pow

public static void pow(double[] data,
       int offset,
       int length,
       double exponent)

reciprocal

public static void reciprocal(double[] data)

reciprocal

public static void reciprocal(double[] data,
              int offset,
              int length)

scaleAdd

public static void scaleAdd(double[] data,
            double factor,
            double constant)

scaleAdd

public static void scaleAdd(double[] data,
            int offset,
            int length,
            double factor,
            double constant)

abs

public static void abs(double[] data)

abs

public static void abs(double[] data,
       int offset,
       int length)

exp

public static void exp(double[] data)

exp

public static void exp(double[] data,
       int offset,
       int length)

log

public static void log(double[] data)

log

public static void log(double[] data,
       int offset,
       int length)

sqrt

public static void sqrt(double[] data,
        int offset,
        int length)

negate

public static void negate(double[] data)

negate

public static void negate(double[] data,
          int offset,
          int length)

equals

public static boolean equals(double[] as,
             double[] bs)

equals

public static boolean equals(double[] as,
             int aOffset,
             double[] bs,
             int bOffset,
             int length)

isBoolean

public static boolean isBoolean(double[] data)

isBoolean

public static boolean isBoolean(double[] data,
                int offset,
                int length)

isZero

public static boolean isZero(double[] data)

isZero

public static boolean isZero(double[] data,
             int offset,
             int length)

copyOf

public static final double[] copyOf(double[] data)

Fast double array copy operation. Appears to be faster than data.clone() ??

Parameters:

data -

Returns: