How to check monotonity of a vector?
154 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
How to check easily that components of a vector form a monotone (increasing) sequence or not?
1 commentaire
Adam
le 15 Déc 2017
You can use
validateattributes( yourVector, { 'numeric' }, { 'vector', 'increasing' } )
if you just want to validate that it is monotonic and carry on with the code if it is while throwing an error otherwise.
Réponse acceptée
KL
le 15 Déc 2017
Modifié(e) : KL
le 15 Déc 2017
use diff
along with all maybe
a = 1:10;
isIncreasing = all(diff(a)) %or all(diff(a)>=0) if you want to allow 0 difference
1 commentaire
Andreas
le 16 Mar 2022
Take care, that all is also true for negative values.
Therefore, this example has a false positive on b
a = [1:10];
b = [1 2 3 2 1 5];
isIncreasingA = all(diff(a))
isIncreasingB = all(diff(b))
To fix that, restrict to positive values of diff
isIncreasingA = all(diff(a)>0)
isIncreasingb = all(diff(b)>0)
Plus de réponses (1)
Walter Roberson
le 15 Déc 2017
issorted() with 'ascend' (repeats permitted) or 'strictascend' (repeats not permitted)
0 commentaires
Voir également
Catégories
En savoir plus sur Files and Folders 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!