Signum (Jep with extensions API )

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

Direct Known Subclasses:

BigDecSignum
```
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
  
  Constructors
  Constructor Description
  
  Signum()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  java.lang.Object eval(java.lang.Object arg)
  
  double evaluate(double val)
  - Methods inherited from class com.singularsys.jep.functions.UnaryFunction
    instanceOf, instanceOf, run
  - Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand
    asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, 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