com.singularsys.jep.functions
Class Signum

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

All Implemented Interfaces:

PostfixMathCommandI, RealUnaryFunction, java.io.Serializable

public class Signum
extends UnaryFunction
implements RealUnaryFunction

The signum function returns -1 if x<0, 1 if x>0, 0 if x==0.

Since:

3.3

See Also:

Math.signum(double), Serialized Form

Field Summary

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

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Signum()

Method Summary

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

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

Signum

public Signum()

Method Detail

eval

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

Specified by:

eval in class UnaryFunction

Throws:

EvaluationException

evaluate

public double evaluate(double val)

Specified by:

evaluate in interface RealUnaryFunction