How to save indices of a certain region of a matrix

26 vues (au cours des 30 derniers jours)
Ahmad Hasnain
Ahmad Hasnain le 3 Mar 2020
Commenté : Ahmad Hasnain le 3 Mar 2020
I have a matrix, let's say A
A = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16];
I have another matrix, let's say B
B = A(3:end,3:end);
This is how I can simple save B. But instead of saving the values of B. I want to save the indices of B that were in A.
Indices of B in A are 11,12,15 and 16.
How can I do it by using some matlab command?

Réponse acceptée

M
M le 3 Mar 2020
I am not sure if I understood your question but here is a second simple example:
A = [10 11 12;13 14 15; 16 17 18];
B = [14 15; 17 18];
You can see that B is member of A:
idx = ismember(A,B)
idx =
3×3 logical array
0 0 0
0 1 1
0 1 1
And you can get the indices of B in A:
find(idx)
ans =
5
6
8
9

Plus de réponses (1)

Bhaskar R
Bhaskar R le 3 Mar 2020
ind = find(ismember(A(:), B(:)))
  1 commentaire
Ahmad Hasnain
Ahmad Hasnain le 3 Mar 2020
Thanks, both the answers solved my problem.

Connectez-vous pour commenter.

Catégories

En savoir plus sur Multidimensional Arrays dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by