How to find mutual arrays position of multiple matrices with different length

4 vues (au cours des 30 derniers jours)
I have two matrices and I want the corresponding all indices, not just the first one. Here is the example
A = ...
[2 2 4
4 5 4
1 1 4
4 3 2
1 2 4
2 4 4
1 4 1
1 1 1
5 3 3
4 3 5
4 5 4]
and
B = [ 1 4 1
4 3 5
4 5 4]
I used intersect as follows and got the following output:
[AB,ia,ib] = intersect(A,B,'rows')
AB =
1 4 1
4 3 5
4 5 4
ia =
7
10
2
ib =
1
2
3
is it possible to get ia = [7 10 2, 11]?

Réponse acceptée

Walter Roberson
Walter Roberson le 27 Oct 2018
[~, rowidx] = ismember(A,B,'rows');
locs = accumarray(rowidx+1, (1:length(rowidx)).', [], @(v) {v});
ia = locs(2:end);
This needs to be a cell array because there are multiple results for some values.

Plus de réponses (1)

madhan ravi
madhan ravi le 27 Oct 2018
Modifié(e) : madhan ravi le 27 Oct 2018
>> b=find(ismember(A,B,'rows'))'
b =
2 7 10 11
>>
  2 commentaires
madhan ravi
madhan ravi le 27 Oct 2018
use ismember() to get your desired result
UNK
UNK le 27 Oct 2018
Thanks, but I wanted the corresponding indices for each row of B.

Connectez-vous pour commenter.

Catégories

En savoir plus sur Logical dans Help Center et File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by