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. Tunable.

Supported Data Types

• Double-precision floating point
• Single-precision floating point

To learn how to convert to the above data types in MATLAB and Simulink, see Supported Data Types and How to Convert to Them.

See Also

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

Also see Matrix Operations for a list of all the blocks in the Matrix Operations library.

Matrix Product

Matrix Square