Max

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riso.distributions
Class Max

java.lang.Object
  riso.distributions.AbstractConditionalDistribution
      riso.distributions.Max

All Implemented Interfaces:: ConditionalDistribution, java.io.Serializable

public class Max
extends AbstractConditionalDistribution

Field Summary

(package private) int ninputs
          This is the number of inputs for this maximum-taker.

Fields inherited from class riso.distributions.AbstractConditionalDistribution

associated_variable

Constructor Summary

Max()
          Default constructor.

Max(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 distribution 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 density at the point x.

void pretty_input(riso.general.SmarterTokenizer st)
          Read in a Max 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 maximum-taker. This is either specified directly (in a constructor) or by counting the number of parents of the associated variable.

Constructor Detail

Max

public Max()

Default constructor. 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.

Max

public Max(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

ndimensions_child

public int ndimensions_child()

Return the number of dimensions of the child variable.

ndimensions_parent

public int ndimensions_parent()

Return the number of dimensions of the parent variables.

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).

p

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

Description copied from interface: ConditionalDistribution

Compute the density at the point x.

random

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

Return an instance of a random variable from this distribution.

pretty_input

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

Read in a Max 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] }

If ninputs is not specified, it is determined by counting parent variables.

Overrides:: pretty_input in class AbstractConditionalDistribution

format_string

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

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