org.encog.mathutil.matrices
Class BiPolarUtil

java.lang.Object
  org.encog.mathutil.matrices.BiPolarUtil

public final class BiPolarUtil
extends Object

This class contains a number of utility methods used to work with bipolar numbers. A bipolar number is another way to represent binary numbers. The value of true is defined to be one, where as false is defined to be negative one.

Method Summary

static double	bipolar2double(boolean b) Convert a boolean to a bipolar number.
static double[]	bipolar2double(boolean[] b) Convert a boolean array to a bipolar array.
static double[][]	bipolar2double(boolean[][] b)
static boolean	double2bipolar(double d) Convert a bipolar value to a boolean.
static boolean[]	double2bipolar(double[] d) Convert a bipolar array to booleans.
static boolean[][]	double2bipolar(double[][] d) Convert a bipolar array to a boolean array.
static double	normalizeBinary(double d) Normalize a binary number.
static double	toBinary(double d) Convert bipolar to binary.
static double	toBiPolar(double d) Convert binary to bipolar.
static double	toNormalizedBinary(double d) Convert to binary and normalize.

Methods inherited from class java.lang.Object

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

Method Detail

bipolar2double

public static double bipolar2double(boolean b)

Convert a boolean to a bipolar number.

Parameters:

b - A boolean value.

Returns:

A bipolar number.

bipolar2double

public static double[] bipolar2double(boolean[] b)

Convert a boolean array to a bipolar array.

Parameters:

b - A an array of boolean values.

Returns:

An array of bipolar values.

bipolar2double

public static double[][] bipolar2double(boolean[][] b)

Parameters:

b - An array of boolean values.

Returns:

An array of bipolar values.

double2bipolar

public static boolean double2bipolar(double d)

Convert a bipolar value to a boolean.

Parameters:

d - A bipolar value.

Returns:

A boolean value.

double2bipolar

public static boolean[] double2bipolar(double[] d)

Convert a bipolar array to booleans.

Parameters:

d - A bipolar array.

Returns:

An array of booleans.

double2bipolar

public static boolean[][] double2bipolar(double[][] d)

Convert a bipolar array to a boolean array.

Parameters:

d - A bipolar array.

Returns:

A boolean array.

normalizeBinary

public static double normalizeBinary(double d)

Normalize a binary number. If the number is not zero then make it 1, if it is zero, leave it alone.

Parameters:

d - A number to normalize to binary.

Returns:

A binary digit.

toBinary

public static double toBinary(double d)

Convert bipolar to binary.

Parameters:

d - A bipolar number.

Returns:

A binary digit.

toBiPolar

public static double toBiPolar(double d)

Convert binary to bipolar.

Parameters:

d - A binary number.

Returns:

A bipolar number.

toNormalizedBinary

public static double toNormalizedBinary(double d)

Convert to binary and normalize.

Parameters:

d - A number to convert to binary.

Returns:

A normalized binary number.