org.lsmp.djep.vectorJep.function.MDot Maven / Gradle / Ivy
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JEP is a Java library for parsing and evaluating mathematical expressions.
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/*****************************************************************************
JEP - Java Math Expression Parser 2.24
December 30 2002
(c) Copyright 2002, Nathan Funk
See LICENSE.txt for license information.
*****************************************************************************/
package org.lsmp.djep.vectorJep.function;
import java.util.*;
import org.lsmp.djep.vectorJep.*;
import org.lsmp.djep.vectorJep.values.*;
import org.nfunk.jep.*;
/**
* The MDot operator.
* @author Rich Morris
* Created on 23-Feb-2004
*/
public class MDot extends MMultiply implements BinaryOperatorI
{
public MDot() {
numberOfParameters = 2;
}
public Dimensions calcDim(Dimensions l,Dimensions r) {
if(l.equals(r) && l.is1D()) return Dimensions.ONE;
return null;
}
/** calculates the value.
* @param res - results will be stored in this object
* @param lhs - lhs value
* @param rhs - rhs value
* @return res
*/
public MatrixValueI calcValue(MatrixValueI res,MatrixValueI lhs,MatrixValueI rhs) throws ParseException
{
return calcValue((Scaler) res,(MVector) lhs,(MVector) rhs);
}
public Scaler calcValue(Scaler res,MVector lhs,MVector rhs) throws ParseException
{
int len = lhs.getNumEles();
Object val = mul(lhs.getEle(0),rhs.getEle(0));
for(int i=1;i