org.jscience.computing
Class ComputingUtils

java.lang.Object
  org.jscience.computing.ComputingUtils

public final class ComputingUtils
extends java.lang.Object

A class representing some useful methods for computing science

Constructor Summary

ComputingUtils()

Method Summary

double	getAmdahlParallelSpeedup(double f, double n) The Amdahl law for parallel operations, see http://en.wikipedia.org/wiki/Amdahl%27s_law
double	getAmdahlSpeedup(double p, double s) The Amdahl law for sequential operations, see http://en.wikipedia.org/wiki/Amdahl%27s_law
double	getBinaryEntropy(DoubleVector vector) The Shannon binary entropy, see http://en.wikipedia.org/wiki/Information_theory, where we use ln instead of log Each value of the Vector should be between 0 and 1, although this is unchecked See also org.jscience.mathematics.statistics.EngineerMathUtils
double	getEntropy(DoubleVector vector) The Shannon entropy, see http://en.wikipedia.org/wiki/Information_theory Each value of the Vector should be between 0 and 1, although this is unchecked See also org.jscience.mathematics.statistics.EngineerMathUtils
double	getMutualInformation(DoubleVector vectorX, DoubleVector vectorY, DoubleMatrix matrix) The Shannon mutual information, see http://en.wikipedia.org/wiki/Information_theory Each value of the Matrix should be between 0 and 1, although this is unchecked Each value of each Vector should be between 0 and 1, although this is unchecked See also org.jscience.mathematics.statistics.EngineerMathUtils

Methods inherited from class java.lang.Object

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

Constructor Detail

ComputingUtils

public ComputingUtils()

Method Detail

getAmdahlSpeedup

public final double getAmdahlSpeedup(double p,
                                     double s)

The Amdahl law for sequential operations, see http://en.wikipedia.org/wiki/Amdahl%27s_law

Parameters:

p - DOCUMENT ME!

s - DOCUMENT ME!

Returns:

DOCUMENT ME!

getAmdahlParallelSpeedup

public final double getAmdahlParallelSpeedup(double f,
                                             double n)

The Amdahl law for parallel operations, see http://en.wikipedia.org/wiki/Amdahl%27s_law

Parameters:

f - DOCUMENT ME!

n - DOCUMENT ME!

Returns:

DOCUMENT ME!

getEntropy

public final double getEntropy(DoubleVector vector)

The Shannon entropy, see http://en.wikipedia.org/wiki/Information_theory Each value of the Vector should be between 0 and 1, although this is unchecked See also org.jscience.mathematics.statistics.EngineerMathUtils

Parameters:

vector - DOCUMENT ME!

Returns:

DOCUMENT ME!

getBinaryEntropy

public final double getBinaryEntropy(DoubleVector vector)

The Shannon binary entropy, see http://en.wikipedia.org/wiki/Information_theory, where we use ln instead of log Each value of the Vector should be between 0 and 1, although this is unchecked See also org.jscience.mathematics.statistics.EngineerMathUtils

Parameters:

vector - DOCUMENT ME!

Returns:

DOCUMENT ME!

getMutualInformation

public final double getMutualInformation(DoubleVector vectorX,
                                         DoubleVector vectorY,
                                         DoubleMatrix matrix)

The Shannon mutual information, see http://en.wikipedia.org/wiki/Information_theory Each value of the Matrix should be between 0 and 1, although this is unchecked Each value of each Vector should be between 0 and 1, although this is unchecked See also org.jscience.mathematics.statistics.EngineerMathUtils

Parameters:

vectorX - DOCUMENT ME!

vectorY - DOCUMENT ME!

matrix - DOCUMENT ME!

Returns:

DOCUMENT ME!