org.jscience.mathematics.analysis.expressions.symbolic
Class Rand

java.lang.Object
  org.jscience.mathematics.analysis.expressions.OperatorExpression
      org.jscience.mathematics.analysis.expressions.BinaryOperator
          org.jscience.mathematics.analysis.expressions.symbolic.Rand

All Implemented Interfaces:

java.io.Serializable, Expression, JavaExpressible, XMLExpressible

public class Rand
extends BinaryOperator

Class representing a uniformly distributed random number between two Expression objects. The two Expresssion objects will typically be numbers but may be arbitrary Expressions.
Example of use:

 Constant c1 = new Constant( -7 );
 Constant c2 = new Constant( 11 );
 Expression c3 = new Rand( c1, c2 ); // uniformly distributed random number between -7 and 11.
 Expression e1 = ...;
 Expression e2 = ...;
 Expression e3 = new Rand( e1, e2 );
 




See Also:
Expression, 
BinaryOperator, 
Serialized Form






Field Summary

 
Fields inherited from class org.jscience.mathematics.analysis.expressions.BinaryOperator
deriv, evalValid, evalValue, secondOperand, valid
 
Fields inherited from class org.jscience.mathematics.analysis.expressions.OperatorExpression
firstOperand
 



Constructor Summary
Rand(Expression op1,
     Expression op2)



          Creates a Rand object that represent a random number between the
 two expressions.
Rand(Expression op1,
     Expression op2,
     long seed)



          Creates a Rand object that represent a random number between the
 two expressions.
 



Method Summary




 boolean
equals(java.lang.Object e)



          DOCUMENT ME!



 double
eval()



          DOCUMENT ME!



 boolean
isDifferentiable()



          DOCUMENT ME!



 boolean
isExpandable()



          DOCUMENT ME!



 Expression
optimize()



          DOCUMENT ME!



 Expression
replace(Expression a,
        Expression b)



          DOCUMENT ME!



 java.lang.String
toJava()



          DOCUMENT ME!



 java.lang.String
toString()



          DOCUMENT ME!



 java.lang.String
toXML()



          DOCUMENT ME!


 
Methods inherited from class org.jscience.mathematics.analysis.expressions.BinaryOperator
diff, getElements, getSecondOperand, resetNumDiff, resetNumEval, setIndex, setNumberOfIndependents, setSecondOperand, toTaylorMap
 
Methods inherited from class org.jscience.mathematics.analysis.expressions.OperatorExpression
contains, factor, getFirstOperand, isolate, isolate, setFirstOperand
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 





Constructor Detail



Rand
public Rand(Expression op1,
            Expression op2,
            long seed)

Creates a Rand object that represent a random number between the
 two expressions.


Parameters:
op1 - First Expression object.
op2 - Second Expression object.
seed - a seed for the random number generator.




Rand
public Rand(Expression op1,
            Expression op2)

Creates a Rand object that represent a random number between the
 two expressions.


Parameters:
op1 - First Expression object.
op2 - Second Expression object.





Method Detail



eval
public double eval()

DOCUMENT ME!



Returns:
DOCUMENT ME!





isDifferentiable
public boolean isDifferentiable()

DOCUMENT ME!


Specified by:
isDifferentiable in interface Expression
Overrides:
isDifferentiable in class BinaryOperator



Returns:
DOCUMENT ME!
See Also:
Expression.isDifferentiable()





isExpandable
public boolean isExpandable()

DOCUMENT ME!


Specified by:
isExpandable in interface Expression
Overrides:
isExpandable in class BinaryOperator



Returns:
DOCUMENT ME!
See Also:
Expression.isExpandable()





replace
public Expression replace(Expression a,
                          Expression b)

DOCUMENT ME!


Parameters:
a - DOCUMENT ME!
b - DOCUMENT ME!
Returns:
DOCUMENT ME!





equals
public boolean equals(java.lang.Object e)

DOCUMENT ME!


Overrides:
equals in class java.lang.Object


Parameters:
e - DOCUMENT ME!
Returns:
DOCUMENT ME!





toString
public java.lang.String toString()

DOCUMENT ME!


Overrides:
toString in class java.lang.Object



Returns:
DOCUMENT ME!





toJava
public java.lang.String toJava()

DOCUMENT ME!



Returns:
DOCUMENT ME!





optimize
public Expression optimize()

DOCUMENT ME!



Returns:
DOCUMENT ME!





toXML
public java.lang.String toXML()

DOCUMENT ME!



Returns:
DOCUMENT ME!