com.singularsys.jep.functions
Class LogBase2

java.lang.Object
  com.singularsys.jep.functions.PostfixMathCommand
      com.singularsys.jep.functions.UnaryFunction
          com.singularsys.jep.functions.LogBase2

All Implemented Interfaces:

PostfixMathCommandI, RealUnaryFunction, java.io.Serializable

public class LogBase2
extends UnaryFunction
implements RealUnaryFunction

Log base 2. Other bases can be specified in constructor. Behaviour for negative real values are specified by the strict argument.

See Also:

Serialized Form

Field Summary

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

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

LogBase2()
Standard constructor, allows complex results for negative arguments

LogBase2(boolean strict)
Constructor with control for behaviour for complex results

LogBase2(double base, boolean strict)
Constructor for bases other than 2.

Method Summary

java.lang.Object	eval(java.lang.Object arg)
double	evaluate(double val)
java.lang.Object	logbase2(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

LogBase2

public LogBase2()

Standard constructor, allows complex results for negative arguments

LogBase2

public LogBase2(boolean strict)

Constructor with control for behaviour for complex results

Parameters:

strict - if true negative real arguments return NaN, otherwise complex results are returned

LogBase2

public LogBase2(double base,
                boolean strict)

Constructor for bases other than 2.

Parameters:

base - base to use.

strict - if true negative real arguments return NaN, otherwise complex results are returned

Method Detail

eval

public java.lang.Object eval(java.lang.Object arg)
                      throws EvaluationException

Specified by:

eval in class UnaryFunction

Throws:

EvaluationException

logbase2

public java.lang.Object logbase2(java.lang.Object param)
                          throws EvaluationException

Throws:

EvaluationException

evaluate

public double evaluate(double val)

Specified by:

evaluate in interface RealUnaryFunction