org.lsmp.djep.vectorJep.function.VSum Maven / Gradle / Ivy
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JEP is a Java library for parsing and evaluating mathematical expressions.
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/* @author rich
* Created on 13-Feb-2005
*
* See LICENSE.txt for license information.
*/
package org.lsmp.djep.vectorJep.function;
import java.util.Stack;
import org.lsmp.djep.vectorJep.Dimensions;
import org.lsmp.djep.vectorJep.values.*;
import org.nfunk.jep.ParseException;
import org.nfunk.jep.function.*;
/**
* Adds the elements of a vector or matrix.
* vsum([1,2,3]) -> 6
* vsum([[1,2],[3,4]]) -> 10
*
* @author Rich Morris
* Created on 13-Feb-2005
*/
public class VSum extends PostfixMathCommand implements UnaryOperatorI
{
Add add = new Add();
public VSum()
{
super();
this.numberOfParameters = 1;
}
public Dimensions calcDim(Dimensions ldim)
{
return Dimensions.ONE;
}
public MatrixValueI calcValue(MatrixValueI res, MatrixValueI lhs)
throws ParseException
{
if(!(res instanceof Scaler))
throw new ParseException("vsum: result must be a scaler");
Object val = lhs.getEle(0);
for(int i=1;i