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row of all 8’s

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Chung Di
Chung Di on 23 Nov 2017
Suppose O=ones(n) Now how can I insert a row of all 8’s between rows (n-3) and (n-2) of matrix O and insert a column of all 8’s between columns 1 and 2 of matrix )

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Kaushik Lakshminarasimhan
Kaushik Lakshminarasimhan on 23 Nov 2017
Edited: Kaushik Lakshminarasimhan on 24 Nov 2017
N = 10;
X = ones(N); % create a matrix of 1s
X = [X(1:N-3,:) ; 8*ones(1,N) ; X(N-2:end,:)]; % add a row of 8s between (N-3)th and (N-2)th row
X = [X(:,1) 8*ones(N+1,1) X(:,2:end)]; % add a column of 8s between 1st and 2nd columns
  9 Comments
Chung Di
Chung Di on 24 Nov 2017
It will be really helpful if you use comments beside the code, so that I can understand the code, rather than copy paste Thank you so much
Kaushik Lakshminarasimhan
Kaushik Lakshminarasimhan on 24 Nov 2017
I didn't add comments because I thought it was self-explanatory. Anyway, I have edited my answer to include comments.

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