org.ptolemy.machineLearning

Class Algorithms

java.lang.Object

org.ptolemy.machineLearning.Algorithms

public class Algorithms
extends java.lang.Object

Algorithms class.

Since:

Ptolemy II 10.0

Version:

$Id: Algorithms.java 70402 2014-10-23 00:52:20Z cxh $

Author:

ilgea

Accepted Rating:

Red (cxh)

Proposed Rating:

Red (cxh)

Constructor Summary

Constructors

Constructor and Description
Algorithms()

Method Summary

Modifier and Type	Method and Description
static int	_binaryIntervalSearch(double[] A, double key) Do a binary interval search for the key in array A.
static int	_binaryIntervalSearch(double[] A, double key, int imin, int imax) Do a binary interval search for the key in array A.
static double	poissonPmf(int k, double mean) Return the probability mass function P(x=k) ~ Poisson(mean) value at k, for the Poisson distribution with parameter mean
static double	poissonPmf(int k, double mean, double logFactorial) Return the probability mass function P(x=k) ~ Poisson(mean) value at k, for the poisson distribution with parameter mean

Methods inherited from class java.lang.Object

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

Constructor Detail

Algorithms

public Algorithms()

Method Detail

poissonPmf

public static double poissonPmf(int k,
                                double mean)
                         throws IllegalActionException

Return the probability mass function P(x=k) ~ Poisson(mean) value at k, for the Poisson distribution with parameter mean

Parameters:

k - The value at which the probability mass function will be computed

mean - The mean (lambda) of the poisson distribution

Returns:

The PMF value at k.

Throws:

IllegalActionException

java.lang.Exception - If k < 0

poissonPmf

public static double poissonPmf(int k,
                                double mean,
                                double logFactorial)
                         throws IllegalActionException

Return the probability mass function P(x=k) ~ Poisson(mean) value at k, for the poisson distribution with parameter mean

Parameters:

k - The value at which the probability mass function will be computed

mean - The mean (lambda) of the poisson distribution

Returns:

The PMF value at k.

Throws:

IllegalActionException

java.lang.Exception - If k < 0

_binaryIntervalSearch

public static int _binaryIntervalSearch(double[] A,
                                        double key)

Do a binary interval search for the key in array A. The bin index in which key is found is returned.

Parameters:

A - The search array

key - Key to be searched

Returns:

the found key index.

_binaryIntervalSearch

public static int _binaryIntervalSearch(double[] A,
                                        double key,
                                        int imin,
                                        int imax)

Do a binary interval search for the key in array A. The bin index in which key is found is returned.

Parameters:

A - A The search array

key - Key to be searched

imin - minimum array index to look for key

imax - maximum array index to look for key

Returns:

the found key index, or value of KEY_NOT_FOUND for not found.