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riso.distributions
Class ExactlyOne  

java.lang.Object
  riso.distributions.AbstractConditionalDistribution
      riso.distributions.ExactlyOne

All Implemented Interfaces:

ConditionalDistribution, java.io.Serializable

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public class ExactlyOne

extends AbstractConditionalDistribution

An object of this class represents an "exactly-one" gate. The output of the gate is 1 if exactly one of the inputs is 1, and zero otherwise.

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Field Summary
(package private)  int	ninputs           This is the number of inputs for this "exactly-one" gate.

 

Fields inherited from class riso.distributions.AbstractConditionalDistribution

associated_variable

 

Constructor Summary

ExactlyOne()           Default constructor for a "exactly-one" gate.

ExactlyOne(int ninputs_in)           This constructor sets the number of inputs.

 

Method Summary
java.lang.Object	clone()           Return a copy of this object.
java.lang.String	format_string(java.lang.String leading_ws)           Create a description of this "exactly one" gate as a string.
Distribution	get_density(double[] c)           For a given value c of the parents, return a distribution which represents p(x|C=c).
int	ndimensions_child()           Return the number of dimensions of the child variable.
int	ndimensions_parent()           Return the number of dimensions of the parent variables.
double	p(double[] x, double[] c)           Compute the probability that the output is 1 (if x[0]==1) or the output is 0 (if x[0]==0).
void	pretty_input(riso.general.SmarterTokenizer st)           Read in a ExactlyOne from an input stream.
double[]	random(double[] c)           Return an instance of a random variable from this distribution.

 

Methods inherited from class riso.distributions.AbstractConditionalDistribution

get_nstates, parse_string, pretty_output, set_variable, toString

 

Methods inherited from class java.lang.Object

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

 

Field Detail

ninputs

int ninputs

This is the number of inputs for this "exactly-one" gate. This is either specified directly (in a constructor) or by counting the number of parents of the associated variable.

Constructor Detail

ExactlyOne

public ExactlyOne()

Default constructor for a "exactly-one" gate. The number of inputs is set to 0; it is assumed that a variable will be associated with this distribution before any methods that need the number of inputs are called.

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ExactlyOne

public ExactlyOne(int ninputs_in)

This constructor sets the number of inputs.

Method Detail

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Return a copy of this object.

Specified by:

clone in interface ConditionalDistribution

Overrides:

clone in class AbstractConditionalDistribution

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ndimensions_child

public int ndimensions_child()

Return the number of dimensions of the child variable.

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ndimensions_parent

public int ndimensions_parent()

Return the number of dimensions of the parent variables.

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get_density

public Distribution get_density(double[] c)
                         throws java.lang.Exception

For a given value c of the parents, return a distribution which represents p(x|C=c). Executing get_density(c). p(x) will yield the same result as p(x,c).

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p

public double p(double[] x,
                double[] c)
         throws java.lang.Exception

Compute the probability that the output is 1 (if x[0]==1) or the output is 0 (if x[0]==0).

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random

public double[] random(double[] c)
                throws java.lang.Exception

Return an instance of a random variable from this distribution.

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pretty_input

public void pretty_input(riso.general.SmarterTokenizer st)
                  throws java.io.IOException

Read in a ExactlyOne from an input stream. This is intended for input from a human-readable source; this is different from object serialization. The input looks like this:

   { [ninputs ninputs-value] }
 

Overrides:

pretty_input in class AbstractConditionalDistribution

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format_string

public java.lang.String format_string(java.lang.String leading_ws)
                               throws java.io.IOException

Create a description of this "exactly one" gate as a string. If this distribution is associated with a variable, the number of inputs is not put into the description.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> riso >> [ distributions overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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