com.singularsys.jep.functions
Class StrictNaturalLogarithm

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

public class StrictNaturalLogarithm
extends UnaryFunction
implements RealUnaryFunction

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

See Also:
Serialized Form

Field Summary
 
Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand
curNumberOfParameters, name, NaN, numberOfParameters
 
Constructor Summary
StrictNaturalLogarithm()
          Standard base-e logarithm.
StrictNaturalLogarithm(double base)
          Logarithm to any other base.
 
Method Summary
 java.lang.Object eval(java.lang.Object arg)
           
 double evaluate(double val)
           
 java.lang.Object ln(java.lang.Object param)
           
 
Methods inherited from class com.singularsys.jep.functions.UnaryFunction
run
 
Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand
asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, checkStack, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

StrictNaturalLogarithm

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

Parameters:
base -

StrictNaturalLogarithm

public StrictNaturalLogarithm()
Standard base-e logarithm.

Method Detail

eval

public java.lang.Object eval(java.lang.Object arg)
                      throws EvaluationException
Specified by:
eval in class UnaryFunction
Throws:
EvaluationException

ln

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

evaluate

public double evaluate(double val)
Specified by:
evaluate in interface RealUnaryFunction


Copyright © 2010 Singular Systems http://www.singularsys.com/jep