How to find elements of first matrix based on second matrix?

I have two matrices A and B
A = [1 2 3 4 5 6 7 8 9 10];
B = [1 0 0 1 0 1 0 1 1 1];
How to find entries of A coresponsing to '1' in B
result = [1 4 6 8 9 10];

1 commentaire

Note that FIND is not required, logical indexing is simpler and more efficient:
A = [1 2 3 4 5 6 7 8 9 10];
B = [1 0 0 1 0 1 0 1 1 1];
C = A(B==1)
C = 1×6
1 4 6 8 9 10

Connectez-vous pour commenter.

Réponses (1)

use find function
A = [1 2 3 4 5 6 7 8 9 10];
B = [1 0 0 1 0 1 0 1 1 1];
result=A(find(B==1))
result = 1×6
1 4 6 8 9 10

2 commentaires

FIND is not required, logical indexing is simpler and more efficient:
A = [1 2 3 4 5 6 7 8 9 10];
B = [1 0 0 1 0 1 0 1 1 1];
C = A(B==1)
C = 1×6
1 4 6 8 9 10

Connectez-vous pour commenter.

Catégories

Question posée :

le 23 Fév 2022

Commenté :

le 23 Fév 2022

Community Treasure Hunt

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

Start Hunting!

Translated by