com.numericalmethod.suanshu.number.doublearray

Class DoubleArrayMath

java.lang.Object

com.numericalmethod.suanshu.number.doublearray.DoubleArrayMath

public class DoubleArrayMath
extends java.lang.Object

These are the math functions that operate on double[]. In other words, this provide an array version of Math.

These functions are static and stateless.

Method Summary

Modifier and Type	Method and Description
static double[]	abs(double[] doubles) Get the absolute values.
static double[]	add(double[] doubles, double value) Adds a double value to each element in an array.
static double[]	exp(double[] doubles) Get the exponentials of values.
static double[]	log(double[] doubles) Get the logs of values.
static double	max(double... doubles) Get the maximum of the values.
static int	max(int... integers) Get the maximum of the values.
static double	min(double... doubles) Get the minimum of the values.
static double[]	signum(double[] doubles) Get the signs of values.
static double[]	sqrt(double[] doubles) Get the square roots of values.
static double	sum(double... doubles) Get the sum of the values.
static int	sum(int... integers) Get the sum of the values.
static double	sum2(double... doubles) Get the sum of squares of the values.

Methods inherited from class java.lang.Object

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

Method Detail

min

public static double min(double... doubles)

Get the minimum of the values.

Parameters:

doubles - an array of doubles

Returns:

the smallest of the inputs

max

public static double max(double... doubles)

Get the maximum of the values.

Parameters:

doubles - an array of doubles

Returns:

the biggest of the inputs

max

public static int max(int... integers)

Get the maximum of the values.

Parameters:

integers - an array of ints

Returns:

the biggest of the inputs

abs

public static double[] abs(double[] doubles)

Get the absolute values.

Parameters:

doubles - an array of doubles

Returns:

the absolute values of the inputs

sum

public static double sum(double... doubles)

Get the sum of the values.

Parameters:

doubles - an array of doubles

Returns:

the sum of the inputs

sum

public static int sum(int... integers)

Get the sum of the values.

Parameters:

integers - an array of ints

Returns:

the sum of the inputs

sum2

public static double sum2(double... doubles)

Get the sum of squares of the values.

Parameters:

doubles - an array of doubles

Returns:

the sum of squares of the inputs

log

public static double[] log(double[] doubles)

Get the logs of values.

Parameters:

doubles - an array of doubles

Returns:

the logs of the inputs

exp

public static double[] exp(double[] doubles)

Get the exponentials of values.

Parameters:

doubles - an array of doubles

Returns:

the exponentials of the inputs

sqrt

public static double[] sqrt(double[] doubles)

Get the square roots of values.

Parameters:

doubles - an array of doubles

Returns:

the square roots of the inputs

signum

public static double[] signum(double[] doubles)

Get the signs of values.

Parameters:

doubles - an array of doubles

Returns:

the signs of the inputs

add

public static double[] add(double[] doubles,
                           double value)

Adds a double value to each element in an array.

Parameters:

doubles - the double array

value - the value to be added

Returns:

the double array with the value added