Check for optional inputs in a function using exist
29 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Haris K.
le 28 Oct 2020
Réponse apportée : Walter Roberson
le 28 Oct 2020
Hi everyone. Is it wrong, prone to mistakes, or slower to check the existance of optional arguments in a function using exist()? For the purposes of the illustration, assume I have 2 required and 1 optional inputs named r1,r2 and op1, respectively.
function y = mafun(r1,r2,op1)
if ~(exist('op1', 'var')==1)
op1 = 'smthn';
end
%do smthn with r1,r2 and op1 (when needed)
end
1 commentaire
Réponse acceptée
Walter Roberson
le 28 Oct 2020
I suspect that it is faster to check nargin.
Note: starting R2019b, it is possible to use an "arguments" block to do automatic default values.
0 commentaires
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Logical 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!