How to find out whether there is a repetitive element in the columns of a matrix?
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
IBM watson
il 17 Apr 2019
Commentato: IBM watson
il 17 Apr 2019
example:
a=[ 1 2 3
4 2 1
1 4 2]
Bold ones are that what I am looking for. There is no need for imformation about their indexes. I just want to know whether there is or not.
Thank you.
0 Commenti
Risposta accettata
madhan ravi
il 17 Apr 2019
Repetitions_in_columns=true(size(a,2),1);
for k = 1:size(a,2)
Repetitions_in_columns(k)=any(sum(a(:,k)==unique(a(:,k)).')>1);
end
Repetitions_in_columns % 1 means yes 0 means no each
Più risposte (1)
Stephen23
il 17 Apr 2019
"I just want to know whether there is or not."
>> any(diff(sort(a,1),1)==0,1)
ans =
1 1 0
2 Commenti
Vedere anche
Categorie
Scopri di più su Data Type Conversion in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!