Effacer les filtres
Effacer les filtres

Replacing a for loop with logical indexing

8 vues (au cours des 30 derniers jours)
Tyler
Tyler le 28 Avr 2016
Commenté : Tyler le 28 Avr 2016
If someone could help me out with this simple problem, I would really appreciate it. I'm still trying to wrap my head around indexing. I have a 5x5 array [A], and I would like have a logical 1x5 array B, where B indicates the columns of A that have 3 or more NaN values. So far I've been able to make a for loop, but I would like to simplify this if possible to a logical index.
A = [1,2,3,4,5;2,3,4,5,6;NaN,NaN,NaN,NaN,NaN;NaN,NaN,NaN,4,NaN;NaN,NaN,7,8,NaN];
B = zeros(1,5);
for i = 1:5
if numel(find(isnan(A(:,i)))) > 2
B(i) = 1;
end
end
(output) B = [1,1,0,0,1]
Thank you for your time.

Réponse acceptée

Azzi Abdelmalek
Azzi Abdelmalek le 28 Avr 2016
Modifié(e) : Azzi Abdelmalek le 28 Avr 2016
out=sum(isnan(A))>=3

Plus de réponses (1)

Jon
Jon le 28 Avr 2016
B = sum(isnan(A))>2;

Catégories

En savoir plus sur Matrix Indexing 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!

Translated by