# Replacing elements in a vector

4 vues (au cours des 30 derniers jours)
L'O.G. le 16 Juil 2022
Commenté : L'O.G. le 17 Juil 2022
The values of an array match the index of elements in a vector. For example, the value of 5 in array1 below corresponds to whatever is in index 5 in vector1, i.e. the number 3 in this case. So how do I replace the value of the original number in array1 in the example by the number at the corresponding index in vector1? I realize this is a little confusing, so here's a mini example of what I want to do:
array1 = [1 2; 4 2; 5 5; 4 2];
vector1 = [2 1 1 4 3 4];
result = [2 1; 4 1; 3 3; 4 1];
##### 0 commentairesAfficher -1 commentaires plus anciensMasquer -1 commentaires plus anciens

Connectez-vous pour commenter.

### Réponse acceptée

Paul le 17 Juil 2022
array1 = [1 2; 4 2; 5 5; 4 2];
vector1 = [2 1 1 4 3 4];
result = [2 1; 4 1; 3 3; 4 1]
result = 4×2
2 1 4 1 3 3 4 1
result1 = vector1(array1)
result1 = 4×2
2 1 4 1 3 3 4 1
##### 3 commentairesAfficher 2 commentaires plus anciensMasquer 2 commentaires plus anciens
L'O.G. le 17 Juil 2022
Thank you. That is really neat!

Connectez-vous pour commenter.

### Plus de réponses (1)

DGM le 16 Juil 2022
Your example isn't consistent. I'm assuming you want this:
A = [10 20; 30 40; 50 60];
idx = [2 1; 1 4; 3 3];
B = A.';
B = B(idx)
B = 3×2
20 10 10 40 30 30
##### 1 commentaireAfficher AucuneMasquer Aucune
L'O.G. le 16 Juil 2022
Thank you, but no, that's not what I want. I've edited my question to hopefully make it clearer.

Connectez-vous pour commenter.

### Catégories

En savoir plus sur Matrix Indexing dans Help Center et File Exchange

R2021b

### Community Treasure Hunt

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

Start Hunting!

Translated by