UniformReal.java 

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package blog.distrib;

import blog.*;
import java.util.*;
import common.Util;
Uniform distribution over a range of real numbers [lower, upper). The range is open at the upper end for consistency with Random.nextDouble(). 


public class UniformReal extends AbstractCondProbDistrib {
Interprets the parameters as a pair of real numbers (lower, upper) and creates a uniform distribution over the range [lower, upper). exactly two Number objects, or if lower >= upper

Throws:  IllegalArgumentException if params does not consist of 


    public UniformReal(List params) {
	try {
	    lower = ((Number) params.get(0)).doubleValue();
	    upper = ((Number) params.get(1)).doubleValue();
	    if ((lower >= upper) || (params.size() > 2)) {
		throw new IllegalArgumentException();
	    }
	} catch (RuntimeException e) {
	    throw new IllegalArgumentException
		("UniformReal CPD expects two numeric arguments "
		 + "[lower, upper) with lower < upper.  Got: " + params);
	}
    }
Returns 1 / (upper - lower) if the given number is in the range of this distribution, otherwise returns zero. Takes no arguments. value is not a Number

Throws:  IllegalArgumentException if args is non-empty or 


    public double getProb(List args, Object value) {
	if (!args.isEmpty()) {
	    throw new IllegalArgumentException
		("UniformReal CPD does not take any arguments.");
	}
	if (!(value instanceof Number)) {
	    throw new IllegalArgumentException
		("UniformReal CPD defines distribution over objects of class "
		 + "Number, not " + value.getClass() + ".");
	}
	double x = ((Number) value).doubleValue();

	if ((x >= lower) && (x < upper)) {
	    return 1.0 / (upper - lower);
	}
	return 0;
    }
Returns a sample from this distribution.

Throws:  IllegalArgumentException if args is non-empty 


    public Object sampleVal(List args, Type childType) {
	if (!args.isEmpty()) {
	    throw new IllegalArgumentException
		("UniformReal CPD does not take any arguments.");
	}

	// rely on the fact that Util.random() returns a value in [0, 1)
	double x = lower + (Util.random() * (upper - lower));
	return new Double(x);
    }

    private double lower;
    private double upper;
}

This file was generated on Tue Jun 08 17:53:48 PDT 2010 from file UniformReal.java
by the ilog.language.tools.Hilite Java tool written by Hassan Aït-Kaci