Submatrix (DSP Blockset)

Select a subset of elements (submatrix) in a matrix.

Library

Matrix Functions, in Math Functions

Description

The Submatrix block outputs a matrix that is a subset of the input matrix. The submatrix is specified by the Index expression parameter, a cell array containing a comma-separated MATLAB indexing expression, expr. For input u and output y, the indexing operation is equivalent to:

y = u(expr{:})       % equivalent MATLAB code

The end keyword and lone colon (:) operator are not supported in the indexing expression.

Some examples of valid indexing expressions are:


Index Expression	Equivalent MATLAB Code
`{1:2,2:3}`	`y = u(1:2,2:3)`
`{a,b:c}`	`y = u(a,b:c)`
`{[1 3:5],5}`	`y = u([1 3:5],5)`

Dialog Box

Input matrix size: The dimensions of the input matrix.
Index expression: The indexing expression, {rows,columns}. Note the cell array braces. The indexing expression can be changed while the simulation runs, although the dimensions of the specified submatrix must remain the same.