com.singularsys.jep.functions
Class StrictNaturalLogarithm

java.lang.Object
  extended by com.singularsys.jep.functions.PostfixMathCommand
      extended by com.singularsys.jep.functions.StrictNaturalLogarithm
All Implemented Interfaces:
PostfixMathCommandI, java.io.Serializable

public class StrictNaturalLogarithm
extends PostfixMathCommand

A strict version of Natural logarithm. For negative Double arguments the standard NaturalLogarithm class will convert treat the argument and compute the complex logarithm. This class will return Double.NaN for negative Double arguments.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand
curNumberOfParameters, numberOfParameters
 
Constructor Summary
StrictNaturalLogarithm()
          Logarithm base e.
StrictNaturalLogarithm(double base)
          Logarithm to any other base.
 
Method Summary
 java.lang.Object ln(java.lang.Object param)
           
 void run(java.util.Stack<java.lang.Object> inStack)
          Run the function on the stack.
 
Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand
checkNumberOfParameters, checkStack, getNumberOfParameters, setCurNumberOfParameters
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

StrictNaturalLogarithm

public StrictNaturalLogarithm()
Logarithm base e.


StrictNaturalLogarithm

public StrictNaturalLogarithm(double base)
Logarithm to any other base. new StrictNaturalLogarithm(10) for base 10, new StrictNaturalLogarithm(2) for base 2.

Parameters:
base -
Method Detail

run

public void run(java.util.Stack<java.lang.Object> inStack)
         throws EvaluationException
Description copied from interface: PostfixMathCommandI
Run the function on the stack. Pops the arguments from the stack, and pushes the result on the top of the stack.

Throws:
EvaluationException

ln

public java.lang.Object ln(java.lang.Object param)
                    throws EvaluationException
Throws:
EvaluationException


Copyright © 2008 Singular Systems http://www.singularsys.com/jep