SUMPRODUCTThe SUMPRODUCT function calculates the sum of the products of corresponding entries in 2 equally sized arrays or ranges.
Sample Usage
SUMPRODUCT(A2:C5,D2:F5)
SUMPRODUCT({1,2,3,4},{5,6,7,8})
Syntax
SUMPRODUCT(array1, [array2, …])
array1 – The first array or range whose entries will be multiplied with corresponding entries in the second such array or range.
array2, … – [ OPTIONAL – {1,1,1,…} with same length as array1 by default ] – The second array or range whose entries will be multiplied with corresponding entries in the first such array or range.
Notes
Matrix multiplication, MMULT, can also be accomplished using a combination of TRANSPOSE and SUMPRODUCT functions.
See Also
TRANSPOSE: Transposes the rows and columns of an array or range of cells.
MMULT: Calculates the matrix product of two matrices specified as arrays or ranges.
Examples