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Extract Submatrix from Input Signal

This example shows how to use the Submatrix block to extract a 3-by-2 submatrix from the lower-right corner of a 5-by-7 input matrix. The following figure illustrates the operation of the Submatrix block with a 5-by-7 input matrix of random integer elements, randi([0 9],5,7).

Here are the settings used for the Submatrix block in this example.

There are often several possible parameter combinations that you can use to select the same submatrix from the input. For example, in the case of a 5-by-7 input matrix, instead of specifying Last for Ending column, you could select the same submatrix by specifying:

  • Ending column = Index

  • Ending column index = 7

Open and simulate the model. You can see that the 3-by-2 submatrix from the lower-right corner of a 5-by-7 input matrix has been extracted.