Pulling subset from a 2D matrix
6 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi,
I am struggling how to extract part of a 2D matrix based on logical criteria:
example:
a=[1 1 1 ; 2 2 2 ; 3 3 3]
b=a<3 % let say I want to have the subset where a<3
mySubset=a.*b
how can I obtain the subset using logic and not having a line of zeros where a=3?
Thanks
0 commentaires
Réponse acceptée
Azzi Abdelmalek
le 5 Sep 2013
Modifié(e) : Azzi Abdelmalek
le 5 Sep 2013
a=[1 1 1 ; 2 2 2 ; 3 3 3]
b==a<3
mySubset=a.*b
4 commentaires
Roger Stafford
le 5 Sep 2013
The 'all' method only works if all elements of a row in 'a' are less than 3. In general I think what you really want is
mySubset = a(b);
The result will be a one-dimensional array but in the general case that is unavoidable.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Logical 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!