com.singularsys.jep.functions
Class NaturalLogarithm

java.lang.Object
  com.singularsys.jep.functions.PostfixMathCommand
      com.singularsys.jep.functions.UnaryFunction
          com.singularsys.jep.functions.NaturalLogarithm

All Implemented Interfaces:

PostfixMathCommandI, RealUnaryFunction, java.io.Serializable

public class NaturalLogarithm
extends UnaryFunction
implements RealUnaryFunction

Natural logarithm. For positive Double arguments returns a Double: Math.log(value). For negative Double arguments convert to Complex and return the Complex log: Complex(Math.log(Math.abs(value)),Math.PI) For Complex find the complex logarithm: Complex(Math.log(Math.abs(value)),arg(value))

See Also:

StrictNaturalLogarithm, Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

NaturalLogarithm()

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

NaturalLogarithm

public NaturalLogarithm()

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