creating many matrix from one matrix with looping?

Question

I have a square matrix M with 25x25 dimension. Then I want to create 25 matrices as follow:

the first matrix is matrix M without the first row and first column,
the second matrix is matrix M without the second row and second column, - ... so on until 25th matrix.

Generally you provide some demonstrated attempt of your own. Respectfully, this is not a coding service. Provide a specific problem and we can help. — cdeterman
– cdeterman, Commented Oct 30, 2015 at 20:22
It might also be helpful (and improve the usefulness of the answers to you as well as others) if you can give a little bit of context/reasons why you want to solve this particular problem ... (is this homework? if so, it's extra-important to explain what you tried and where you got stuck) — Ben Bolker
– Ben Bolker, Commented Oct 30, 2015 at 20:23
i am so sorry, to be honest i have to create quite complex function in r for my researh. I tried my best to solve it but i got stuck at this moment. i just ask a few question that maybe it's not difficult for you all. pardon me if i made some mistake, thanks for your great advice. thank you @jogo for your help. — Ahmad Zaenal
– Ahmad Zaenal, Commented Oct 30, 2015 at 21:13

jogo · Accepted Answer · 2015-10-30 22:17:20Z

2

this little snippet will do:

lapply(1:25, function(i) M[-i, -i])

answered Oct 30, 2015 at 22:17

jogo

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