selecting desired values
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
i gave some data
column1 column2
1,1 3,4
1,2
1,3
;
;
;
1,100 3,100
2,1
;
;
;
2,100 4,100
I want to select 15 values from each 100 ,the values in column should not change,,
(i.e) 1,1..1,15...2,1...2,15...3,1...3,15...4,1..4,15
can u tell how to process
0 commentaires
Réponse acceptée
Andrei Bobrov
le 1 Nov 2011
[j1,i1] = ndgrid(1:100,1:4);
ind = [i1(:) j1(:)];
somedata = ind(randperm(numel(i1)),:);
idx = bsxfun(@plus,(1:15)',0:100:numel(i1)-1);
out = somedata(idx,:);
0 commentaires
Plus de réponses (1)
Lulu
le 1 Nov 2011
Do you want to select values based on indices? If so, then here is an example: ind = [1; 2; 5; 15]; col1 = array(ind,1); col2 = array(ind,2);
Voir également
Catégories
En savoir plus sur Dates and Time 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!