How to save indices of a certain region of a matrix

26 ビュー (過去 30 日間)
Ahmad Hasnain
Ahmad Hasnain 2020 年 3 月 3 日
コメント済み: Ahmad Hasnain 2020 年 3 月 3 日
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?

採用された回答

M
M 2020 年 3 月 3 日
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

その他の回答 (1 件)

Bhaskar R
Bhaskar R 2020 年 3 月 3 日
ind = find(ismember(A(:), B(:)))
  1 件のコメント
Ahmad Hasnain
Ahmad Hasnain 2020 年 3 月 3 日
Thanks, both the answers solved my problem.

サインインしてコメントする。

カテゴリ

Help Center および File ExchangeMultidimensional Arrays についてさらに検索

Community Treasure Hunt

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

Start Hunting!

Translated by