org.apache.poi.ss.formula.functions
Class Sumproduct

java.lang.Object
  org.apache.poi.ss.formula.functions.Sumproduct

All Implemented Interfaces:

Function

public final class Sumproduct
extends java.lang.Object
implements Function

Implementation for the Excel function SUMPRODUCT

Syntax :
SUMPRODUCT ( array1[, array2[, array3[, ...]]])

array1, ... arrayN	typically area references, possibly cell references or scalar values

Let An_(i,j) represent the element in the ith row jth column of the nth array
Assuming each array has the same dimensions (W, H), the result is defined as:
SUMPRODUCT = Σ_{i: 1..H} ( Σ_{j: 1..W} ( Π_{n: 1..N} An_(i,j) ) )

Author:

Josh Micich

Constructor Summary

Sumproduct()

Method Summary

ValueEval

evaluate(ValueEval[] args, int srcCellRow, int srcCellCol)

Methods inherited from class java.lang.Object

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

Constructor Detail

Sumproduct

public Sumproduct()

Method Detail

evaluate

public ValueEval evaluate(ValueEval[] args,
                          int srcCellRow,
                          int srcCellCol)

Specified by:

evaluate in interface Function

Parameters:

args - the evaluated function arguments. Empty values are represented with BlankEval or MissingArgEval, never null.

srcCellRow - row index of the cell containing the formula under evaluation

srcCellCol - column index of the cell containing the formula under evaluation

Returns:

The evaluated result, possibly an ErrorEval, never null. Note - Excel uses the error code #NUM! instead of IEEE NaN, so when numeric functions evaluate to Double.NaN be sure to translate the result to ErrorEval.NUM_ERROR.