Use values of array as indices for different array
5 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Thomas Augenstein
le 16 Mai 2019
Réponse apportée : Thomas Augenstein
le 16 Mai 2019
I have two matrices, A, B, and C, shown below:
A = [16 2 3 13
5 11 10 8
9 7 6 12
4 14 15 1];
B = [1 3
2 3
1 4];
C = [1 3 4];
I want to use the elements of B and C as indices of A to create a new matrix, D, such that each element in C corresponds to a row index in A, and the values in each row of B correspond to column indices given the row index from C. e.g. C(1) = 1 and B(1,:) = [1 3] gives me D(1,:) = A(1,[1 3]). The resulting matrix D would look as follows:
D = [16 3
7 6
4 1];
This is relatively straightforward with a for-loop, but I was hoping for a one-line solution along the lines of A(C,B) = D, which doesn't do what I'm describing in MATLAB. Does anything like what I'm describing exist?
0 commentaires
Réponse acceptée
Plus de réponses (1)
Voir également
Catégories
En savoir plus sur Matrix Indexing 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!