Sorting complex array with cplxpair and how to get the sort index?
8 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I have a vector of complex numbers, which I sort using cplxpair to get the complex conjugates in ordered pair. But now I need to know the index with respect to the orginal vector.
For example,
I have,
k = [
0.0000 - 0.9998i
0.0000 - 0.9995i
0.0000 + 0.9998i
0.0000 + 0.9995i
-0.0001 - 0.9491i
0.0000 + 0.9995i
0.0000 - 0.9995i
-0.0001 + 0.9491i
]
I use cplxpair(k) and I get,
kp = [
-0.0001 - 0.9491i
-0.0001 + 0.9491i
0.0000 - 0.9998i
0.0000 + 0.9998i
0.0000 - 0.9995i
0.0000 + 0.9995i
0.0000 - 0.9995i
0.0000 + 0.9995i
]
But I need to know how to get the index of 'kp' relating to that of 'k'.
Réponse acceptée
Paul
le 25 Mai 2021
Modifié(e) : Paul
le 25 Mai 2021
ismember() might be what you're looking for. Do you care about how this works if the elements of k are not all unique?
k = [
0.0000 - 0.9998*1i
0.0000 - 0.9995*1i
0.0000 + 0.9998*1i
0.0000 + 0.9995*1i
-0.0001 - 0.9491*1i
0.0000 + 0.9995*1i
0.0000 - 0.9995*1i
-0.0001 + 0.9491*1i];
kp = cplxpair(k);
[~,ind] = ismember(k,kp);
[kp(ind) k]
isequal(kp(ind),k)
Note that k contained duplicate values, so ind is not just a shuffle of 1:8
sort(ind).'
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Matrix Indexing dans Help Center et File Exchange
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!