Extract Triangular Matrix (DSP Blockset)

Extract the lower or upper triangle from an input matrix.

Library

Matrix Functions, in Math Functions

Description

The Extract Triangular Matrix block creates a triangular matrix output from the upper or lower triangular elements of a rectangular input matrix. The Extract parameter selects between the two components of the input:

Upper - Copies the upper triangular elements of the input matrix (including those on the diagonal) to an output matrix of the same size. The lower triangular elements of the output are zero.
Lower - Copies the lower triangular elements of the input matrix (including those on the diagonal) to an output matrix of the same size. The upper triangular elements of the output are zero.

Note
If you expect to generate code for the Extract Triangular Matrix block using the Real-Time Workshop, you should ensure that inputs are contiguous in memory. See the Contiguous Copy block for more information.

Dialog Box

Extract: The component of the matrix to copy to the output, upper triangle or lower triangle. This parameter is not tunable in Simulink's external mode.
Number of columns in A: The number of columns in the input matrix.