DSP Blockset

Matrix Scaling

Scale the rows or columns of a matrix by a specified vector.

Library

Math Functions / Matrices and Linear Algebra / Matrix Operations

Description

The Matrix Scaling block scales the rows or columns of the M-by-N input matrix A by the values in input vector D.

When the Mode parameter is set to Scale Rows (D*A), input D can be a 1-D or 2-D vector of length M, and the block multiplies each element of D across the corresponding row of matrix A.

This is equivalent to premultiplying A by a diagonal matrix with diagonal D.

y = diag(D)*A        % Equivalent MATLAB code

When the Mode parameter is set to Scale Columns (A*D), input D can be a 1-D or 2-D vector of length N, and the block multiplies each element of D across the corresponding column of matrix A.

This is equivalent to postmultiplying A by a diagonal matrix with diagonal D.

y = A*diag(D)        % Equivalent MATLAB code

The output is the same size as the input matrix, A. If both inputs are sample-based, the output is sample-based; otherwise, the output is frame-based.

Dialog Box

Mode

The mode of operation, row scaling or column scaling.

See Also

Matrix Multiply	DSP Blockset
Matrix Product	DSP Blockset
Matrix Sum	DSP Blockset

Matrix Product

Matrix Square