randomly select a number from a matrix
14 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Camilla Santicoli
le 19 Mai 2015
Modifié(e) : Andrei Bobrov
le 19 Mai 2015
Hi all. I have a 365x27 matrix of values where the rows are the different days of a year (365) and the columns the number of years that I am considering (27). What I would like to do is to create a vector 365x1 where every day one value is randomly selected from the initial matrix. So, for the first day the function should randomly select a value out of the first row of the inital matrix, for the second day a value randomly taken from the second row of the inital matrix and so on. Does someone know how to do it? Thanks
0 commentaires
Réponse acceptée
Torsten
le 19 Mai 2015
indexarray=randi(27,365,1);
For k=1:365
Vector(k)=Matrix(k,indexarray(k,1));
end
Best wishes
Torsten.
Plus de réponses (1)
Andrei Bobrov
le 19 Mai 2015
Modifié(e) : Andrei Bobrov
le 19 Mai 2015
n = size(Matrix);
out = Matrix(sub2ind(n,(1:n(1))',randi(n(2),n(1),1)));
Voir également
Catégories
En savoir plus sur Creating and Concatenating Matrices 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!