org.lsmp.djep.xjep.function

Class Sum

java.lang.Object

org.nfunk.jep.function.PostfixMathCommand

org.lsmp.djep.xjep.function.SumType

org.lsmp.djep.xjep.function.Sum

All Implemented Interfaces:

CallbackEvaluationI, PostfixMathCommandI

Direct Known Subclasses:

MSum

public class Sum
extends SumType

A sum function Sum(x^2,x,1,10) finds the sum of x^2 with x running from 1 to 10. Sum(x^2,x,1,10,2) calculates the 1^2+3^2+5^2+7^2+9^2 i.e. in steps of 2.

Author:

Rich Morris Created on 10-Sept-2004

Field Summary

Fields inherited from class org.lsmp.djep.xjep.function.SumType

name

Fields inherited from class org.nfunk.jep.function.PostfixMathCommand

curNumberOfParameters, numberOfParameters

Constructor Summary

Constructors

Constructor and Description
Sum(JEP j)

Method Summary

Modifier and Type	Method and Description
Object	evaluate(Object[] elements) Evaluates the function given the set of y values.

Methods inherited from class org.lsmp.djep.xjep.function.SumType

checkNumberOfParameters, evaluate, evaluate, run

Methods inherited from class org.nfunk.jep.function.PostfixMathCommand

checkStack, getNumberOfParameters, setCurNumberOfParameters

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Sum

public Sum(JEP j)

Method Detail

evaluate

public Object evaluate(Object[] elements)
                throws ParseException

Description copied from class: SumType

Evaluates the function given the set of y values. For example for Sum(x^2,x,1,5) the function will be passed the array [1,4,9,16,25].

Specified by:

evaluate in class SumType

Parameters:

elements - the y values

Returns:

the result of the function

Throws:

ParseException