sumx2my2

Sum of (x² − y²) over paired arrays.

Syntax

v = sumx2my2(array1, array2)

Description

Returns sum(x.^2 - y.^2) — handy for chi-squared and variance-like calculations.

Example

sumx2my2([2 3 4], [1 2 3])    % 4+5+7 = 16

See also

• sumxmy2 — Sum of squared differences between paired arrays.
• sumx2py2 — Sum of (x² + y²) over paired arrays.