i need to pad my matrix only from the ends like this picture

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Answers (1)

DGM
DGM on 19 Nov 2022
Edited: DGM on 19 Nov 2022
You should be able to use padarray() to pad with constant values.
A = magic(5)
A = 5×5
17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9
Apadded = padarray(A,[3 3],0,'post')
Apadded = 8×8
17 24 1 8 15 0 0 0 23 5 7 14 16 0 0 0 4 6 13 20 22 0 0 0 10 12 19 21 3 0 0 0 11 18 25 2 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
In this example, [3 3] specifies the pad width in each dimension. The pad value is 0, and 'post' specifies that only the trailing edge gets padded in either dimension.

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