For uicontrol, why can't "UserData" property hold a structure but 'UserData' can?
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Craig DeAlmeida
le 26 Sep 2018
Commenté : Craig DeAlmeida
le 27 Sep 2018
While converting code in 2018b to use strings as much as possible, ran into this surprising error:
f = figure;
s.a = 1;
uicontrol(f, "String", "Hello", "UserData", s);
The error is "Incorrect number of input arguments". However, the following do not generate errors:
uicontrol(f, "String", "Hello", 'UserData', s);
or
a = 1;
uicontrol(f, "String", "Hello", "UserData", a);
It seems that UserData as a string when naming the property and giving it a structure causes the trouble.
Any thoughts out there?
0 commentaires
Réponse acceptée
Rik
le 26 Sep 2018
One of the many places where using strings instead of char arrays will trip you up. I haven't searched for one, but I've never yet seen a situation where strings solved a problem in such a simple and elegant way that it warrants rewriting half of Matlab for.
I'd suggest looking if there is already a bug report (and create it if there isn't). They will either solve it in an update to R2018b, or in a later release. Until then, just use char arrays. I'm also still using get and set instead of dot-indexing, because I generally don't need to go multiple levels deep (which is the only situation where dot-indexing is better). Fun fact: in set and get the properties are not case sensitive, while with dot-indexing they are.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Migrate GUIDE Apps 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!