sumsqr

Sum of squared elements of matrix or matrices

Syntax

[s,n] = sumsqr(x)

Description

[s,n] = sumsqr(x) takes a matrix or cell array of matrices, x, and returns the sum, s, of all squared finite values in x, and the number of finite values, n.

If x does not contain finite values, the sum returned is 0.

Examples

Calculate the Sum of Squared Elements Using the sumsqr Function

This example shows how to calculate the sum of squared elements of a matrix and a cell array using the sumsqr function.

m = sumsqr([1 2;3 4])

m = 
30

[m,n] = sumsqr({[1 2; NaN 4], [4 5; 2 3]})

m = 
75

n = 
7

Input Arguments

x — Input matrix

matrix | cell array of matrices

Input elements, specified as a matrix or cell array of matrices.

Output Arguments

s — Sum of squared elements

scalar

Sum of all squared elements in x, returned as a scalar.

n — Number of finite values

scalar

Number of finite values in x, returned as a scalar.

Version History

Introduced before R2006a