Vectorization of matrices multiplication
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Eugenio Grabovic
le 21 Jan 2019
Commenté : Eugenio Grabovic
le 21 Jan 2019
Hi,
i have some trouble finding out how to vectorize the following loop:
for k = 1:PointsLength
h(k,1) = transpose(PointsA(:,k) - PointsB(:,k))*normals(:,k);
end
The first thing that comes into my mind is doing this:
all the matrices have 3 x n dimensions and i want h to be 1 x n vector
k = 1:PointsLength
h(:) = transpose(PointsA(:,k) - PointsB(:,k))*normals(:,k);
but its obviously it's not the same thing since im trying to achieve row column multiplication only in pairs ( just k_th row times k_th column, without k_th row times other columns), and thus gives error cause he expects h to be n x n.
Any ideas? Thank you in advance.
2 commentaires
Réponse acceptée
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!