DSP Blockset

Matrix Sum

Sum the elements of a matrix along rows or columns.

Library

Math Functions / Matrices and Linear Algebra / Matrix Operations

Description

The Matrix Sum block sums the elements of an M-by-N input matrix u along either the rows or columns.

When the Sum along parameter is set to Rows, the block sums across the elements of each row and outputs the resulting M-by-1 matrix. A length-N 1-D vector input is treated as a 1-by-N matrix.

This is equivalent to

y = sum(u,2)         % Equivalent MATLAB code

When the Sum along parameter is set to Columns, the block sums down the elements of each column and outputs the resulting 1-by-N matrix. A length-M 1-D vector input is treated as a M-by-1 matrix.

This is equivalent to

y = sum(u)           % Equivalent MATLAB code

The output has the same frame status as the input.

Dialog Box

Sum along

The dimension of the matrix to sum along, row or column.

See Also

Matrix Product	DSP Blockset
Matrix Multiply	DSP Blockset
sum	MATLAB

Matrix Square

Matrix Viewer