"Unable to perform assignment because the left and right sides have a different number of elements error" using find command
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
sermet OGUTCU
il 23 Set 2021
Risposto: Walter Roberson
il 23 Set 2021
reference=[1 2 3 4 5 6 8 9 10];
target=[1 2 3 4 6 7 8 9 10];
for i=1:9
index(i)=find(reference(i)==target);
end
Here, after i reaches 4, "unable to perform assignment" error occurs because:
find(reference(5)==target) = 0×1 empty double column vector
. How I can create the index array without encountering this error such as:
index=[1 2 3 4 0 0 1 1 1]; %or
index=[1 2 3 4 NaN NaN 1 1 1];
My matlab version is R2019a.
0 Commenti
Risposta accettata
Walter Roberson
il 23 Set 2021
reference=[1 2 3 4 5 6 8 9 10];
target=[1 2 3 4 6 7 8 9 10 3 8];
index = [];
complete_reference = [];
for i=1:9
thisref = reference(i);
match = find(thisref==target);
if isempty(match)
complete_reference(end+1) = thisref;
index(end+1) = NaN;
else
index = [index, match];
complete_reference = [complete_reference, repmat(thisref, 1, numel(match))];
end
end
complete_reference
index
We must assume that there could be multiple matches between the target and the reference, not just none or exactly 1, so we created an extended reference that repeats the reference number as often as needed to put in all of the matches.
0 Commenti
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Matrix Indexing 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!