Matrix column selection based on vector with indices
2 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Dominik Rhiem
am 10 Okt. 2022
Bearbeitet: Torsten
am 11 Okt. 2022
Hi all. I have a matrix of size m x n, with all entries as one at initialization. I also have a vector of size 1 x m. Each element is supposed to be between 1 and n, and the corresponding matrix entries are set to 0 (i.e. in the m-th matrix row, this is the column given by the m-th element of the vector). The code for that:
mask(sub2ind(size(mask),(1:numel(vector.'))',vector.')) = 0;
However, due to some modifications I had to make to the code, some elements of the vector can now take a value of 0, i.e. an invalid index. I would simply like to skip those elements. How can I do that?
0 Kommentare
Akzeptierte Antwort
Weitere Antworten (1)
David Hill
am 10 Okt. 2022
Why not just a simple loop?
k=ones(10,14);
v=randi(size(k,2),1,size(k,1));
for j=1:size(k,1)
k(j,v(j))=0;
end
Siehe auch
Kategorien
Mehr zu Creating and Concatenating Matrices finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!