operation between 2 vectors by Indexing
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Dear, I looking to doing a operation (summation for example) between two vectors but the elements indexing are stored in others two vectors:
vectors to summation
A = [10 25 12.5 4 -7.5];
B = [0.05 33.5 -20 12.25 0.65];
Indexing vectors
Aind = [1 4 5 4]; % index for A vector
Bind = [3 2 1 5]; % index for B vector
for result i must have
C(1) = A(1)+B(3) = 10+(-20)
C(2) = A(4)+B(2) = 4+33.5
C(3) = A(5)+B(1) = -7.5+0.05
C(4) = A(4)+B(5) = 4+0.65
I am blocked
for i = 1 : length(Aind)
C(i) = A(Aind ?)+B(Bind ?)
end
0 commentaires
Réponses (1)
Star Strider
le 8 Avr 2017
No loop necessary. You have all the infromation you need in ‘A’, ‘B’, and the index vectors:
C = A(Aind) + B(Bind)
C =
-10 37.5 -7.45 4.65
0 commentaires
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!