using conditional statements inside cellfun
60 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Kaushik Lakshminarasimhan
le 12 Nov 2017
Commenté : Kaushik Lakshminarasimhan
le 12 Nov 2017
Suppose I have two cell arrays X and Y. If Y{i} satisfies a condition, I want to transform X{i} into some X'{i}, otherwise leave X{i} unchanged. Something like:
for i=1:N
if Y{i}>2, X_out{i} = reshape(X_in{i},...);
else X_out{i} = X_in{i}; end
end
How can I do this with cellfun? Multiplying by false won't work because the transformation involves reshaping X{i}. For example, the following doesn't work:
X_out = cellfun(@(x,y) ~(y>2)*x + (y<=2)*reshape(x,...), X_in, Y);
I presume this question applies to anonymous functions in general.
0 commentaires
Réponse acceptée
Walter Roberson
le 12 Nov 2017
You cannot use those kinds of conditionals in cellfun, at least not without the use of an auxillary true function that does the equivalent of the C/C++ question-colon operator.
The workaround is
mask = cellfun(@(y) y>2, Y);
X_out = X_in;
X_out(mask) = cellfun(@(xin) reshape(xin, ...), X_in(mask), 'uniform', 0);
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Matrices and Arrays 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!