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

Question

Afnan on 19 Nov 2022

0
Link

Direct link to this question

https://fr.mathworks.com/matlabcentral/answers/1856793-i-need-to-pad-my-matrix-only-from-the-ends-like-this-picture

Commented: Bruno Luong on 19 Nov 2022

1 Comment
ShowHide None

Bruno Luong on 19 Nov 2022

What represent the three colors?

Sign in to comment.

Sign in to answer this question.

Answer 1

DGM on 19 Nov 2022

1
Link

Direct link to this answer

https://fr.mathworks.com/matlabcentral/answers/1856793-i-need-to-pad-my-matrix-only-from-the-ends-like-this-picture#answer_1105328

Edited: DGM on 19 Nov 2022

You should be able to use padarray() to pad with constant values.

A = magic(5)
A = 5×5
  24     1     8    15
   5     7    14    16
   6    13    20    22
  12    19    21     3
  18    25     2     9
Apadded = padarray(A,[3 3],0,'post')
Apadded = 8×8
  24     1     8    15     0     0     0
   5     7    14    16     0     0     0
   6    13    20    22     0     0     0
  12    19    21     3     0     0     0
  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

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.