How to vectorize the following code?
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Jordan Tryggvesson
le 10 Mai 2021
Commenté : Jordan Tryggvesson
le 10 Mai 2021
I have an nx1 array f and a 3xm array g. I want to carry out the following insertion, where I pick index pairs from the first two rows of g and values from the last row of g:
for int i = 1:m
f(g(1:2,i)) = g(3,i);
end
How can I vectorize the above code? The simple
f(g(1:2,:)) = g(3,:)
does not work and returns the following error
Unable to perform assignment because the left and right sides have a different
number of elements.
Any suggestions?
0 commentaires
Réponse acceptée
Walter Roberson
le 10 Mai 2021
f(g(1:2,:)) = g([3 3], :);
3 commentaires
Walter Roberson
le 10 Mai 2021
Looks okay. Another way would be
f(g(1:2,:)) = kron([1;1], g(3,:).*g(4,:));
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Matrix Indexing dans Help Center et File Exchange
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!