Package com.singularsys.jep.functions

Class SquareRoot

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.UnaryFunction

com.singularsys.jep.functions.SquareRoot

All Implemented Interfaces:

PostfixMathCommandI, RealUnaryFunction, Serializable

public class SquareRoot
extends UnaryFunction
implements RealUnaryFunction

Square root function. Positive Number arguments returns double results. Negative Number arguments return Complex results by default or Double.NaN if the strict flag is set in constructor. Complex arguments return Complex results.

See Also:

• Serialized Form

Field Summary

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

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
SquareRoot()	Standard constructor, Complex results for negative Number arguments.
SquareRoot(boolean strict)	Controls behaviour for negative real arguments.

Method Summary

Modifier and Type	Method	Description
Object	eval(Object arg)	Evaluate the function
double	evaluate(double val)
Object	sqrt(Object x)	Calculates the square root of the parameter.

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 Details

SquareRoot

public SquareRoot()

Standard constructor, Complex results for negative Number arguments.

SquareRoot

public SquareRoot(boolean strict)

Controls behaviour for negative real arguments.

Parameters:

strict - true then returns NaN for negative real arguments, false to return complex results for negative real arguments.

Method Details

eval

public Object eval(Object arg)
            throws EvaluationException

Description copied from class: UnaryFunction

Evaluate the function

Specified by:

eval in class UnaryFunction

Parameters:

arg - the single argument passed in

Returns:

the result of the function

Throws:

EvaluationException

sqrt

public Object sqrt(Object x)
            throws EvaluationException

Calculates the square root of the parameter. The parameter must either be of type Double or Complex.

Parameters:

x - value

Returns:

The square root of the parameter.

Throws:

EvaluationException - if the calculation cannot be performed

evaluate

public double evaluate(double val)

Specified by:

evaluate in interface RealUnaryFunction