cell2mat too slow

10 vues (au cours des 30 derniers jours)
Douglas Chiang
Douglas Chiang le 29 Juil 2021
Commenté : Douglas Chiang le 31 Juil 2021
Hi community,
I am trying to extract all poses from a struct by:
arrayfun(@(node)(node.pose), nodes, 'UniformOutput', false)
It gives me something like this:
ans =
50×1 cell array
{[ -0.2232 6.2129 0.8631 -0.5050 0]}
{[-0.5066 5.4770 -0.9729 -0.2310 0]}
{[ -0.2650 6.0300 0.7742 -0.6329 0]}
{[ -0.0436 5.4497 0.7313 -0.6820 0]}
{[ -0.0892 5.5517 -0.4583 0.8888 0]}
{[ 0.4760 6.0669 -0.3153 -0.9490 0]}
{[ -0.5377 6.2957 0.9279 -0.3729 0]}
{[-0.6971 5.9071 -0.7730 -0.6344 0]}
...
But I want it to be a matrix like this:
ans =
-0.2232 6.2129 0.8631 -0.5050 0
-0.5066 5.4770 -0.9729 -0.2310 0
-0.2650 6.0300 0.7742 -0.6329 0
-0.0436 5.4497 0.7313 -0.6820 0
-0.0892 5.5517 -0.4583 0.8888 0
0.4760 6.0669 -0.3153 -0.9490 0
-0.5377 6.2957 0.9279 -0.3729 0
-0.6971 5.9071 -0.7730 -0.6344 0
...
So I use cell2mat:
cell2mat(arrayfun(@(node)(node.pose), nodes, 'UniformOutput', false))
But the function cell2mat is spending around 50% of runtime for my program, which slow down quite a lot.
Is there anyway to avoid cell2mat that has an efficient runtime?
Thanks

Réponse acceptée

Bruno Luong
Bruno Luong le 29 Juil 2021
Try
cat(1, nodes.pose)
  2 commentaires
Douglas Chiang
Douglas Chiang le 31 Juil 2021
Thanks, this is much faster than cell2mat()

Connectez-vous pour commenter.

Plus de réponses (1)

Yazan
Yazan le 29 Juil 2021
To speed up the computations, you simply need to avoid using structure arrays.

Catégories

En savoir plus sur Logical dans Help Center et File Exchange

Produits


Version

R2021a

Community Treasure Hunt

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

Start Hunting!

Translated by