sumxpy

Sum of element-wise sums: sum(A + B).

Syntax

c = sumxpy(A, B)

Description

Returns sum(A + B) computed in one pass (skipping the intermediate elementwise array). Useful for performance-critical inner loops.

Example

sumxpy([1 2 3], [4 5 6])    % 21  (= sum of [5 7 9])

See also

• sumxmy — Sum of element-wise differences: sum(A - B).
• sumxpy2 — Sum of squared element-wise sums: sum((A + B).^2).
• sum — Sum elements of an array.