How to slice an array across multiple dimensions with two limit arrays?
19 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Brian Kardon
le 22 Avr 2022
Modifié(e) : Bruno Luong
le 22 Avr 2022
I'm interested in taking an arbitrary N-dimensional array, and two 1xN vectors, and using the two vectors as start/stop indices to slice the array, but I'm not sure how. Here's what I mean:
Let X be an N-dimensional array.
Let A and B be 1xN vectors like so:
A=[a1, a2, ..., aN]
B=[b1, b2, ..., bN]
How do I slice X such that I get this:
Y = X(a1:b1, a2:b2, ..., aN:bN)
I tried X(A:B), but that doesn't work - not even sure what that operation is doing, but it isn't doing what I want. I tried to think of some way to do it with logical indexing, but nothing simple came to mind. I could slice the array one dimension at a time in a loop, but it seems like there must be a one-liner. Thanks!
0 commentaires
Réponse acceptée
Bruno Luong
le 22 Avr 2022
Modifié(e) : Bruno Luong
le 22 Avr 2022
This should work
X=rand(6,6,6);
A=[1 2 3]; B=[6 5 4];
cidx = arrayfun(@(i1,i2) i1:i2, A, B, 'unif', 0);
Y = X(cidx{:})
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Creating and Concatenating Matrices 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!