How to vectorize the following code?
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Jordan Tryggvesson
am 10 Mai 2021
Kommentiert: Jordan Tryggvesson
am 10 Mai 2021
I have an nx1 array f and a 3xm array g. I want to carry out the following insertion, where I pick index pairs from the first two rows of g and values from the last row of g:
for int i = 1:m
f(g(1:2,i)) = g(3,i);
end
How can I vectorize the above code? The simple
f(g(1:2,:)) = g(3,:)
does not work and returns the following error
Unable to perform assignment because the left and right sides have a different
number of elements.
Any suggestions?
0 Kommentare
Akzeptierte Antwort
Walter Roberson
am 10 Mai 2021
f(g(1:2,:)) = g([3 3], :);
3 Kommentare
Walter Roberson
am 10 Mai 2021
Looks okay. Another way would be
f(g(1:2,:)) = kron([1;1], g(3,:).*g(4,:));
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Matrix Indexing finden Sie in Help Center und File Exchange
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!