The number of consecutive ocurrances in an array
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I have an array that is shown as: a=[0,0,1,1,1,0,0,1] and I would like to get the number of consecutive ocurrances in it along with the number itself meaning that I would like the output to be b=[2,0,3,1,2,0,1,1] where 0 occurred two consecutive times, 1 occurred three consecutive times, etc. Please help me and thank you in advance.
3 commentaires
John Chilleri
le 1 Mai 2017
The b is a description of vector a:
Two 0s, then three 1s, then two 0s, then one 1.
Réponses (1)
Guillaume
le 1 Mai 2017
This is trivially achieved with diff and find:
a = [0, 0, 1, 1, 1, 0, 0, 1];
transitions = find(diff(a));
runlengths = diff([0, transitions, numel(a)]);
runvalues = a([transitions, end]);
valuelength = reshape([runlengths; runvalues], 1, [])
1 commentaire
Voir également
Catégories
En savoir plus sur Elementary Math 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!