Modify off diagonal elements of Matrix without looping
35 views (last 30 days)
Show older comments
Hello
I have a MXM matrix. Is there a way to set off diagonal elements to a specified value (.e.g. I want all off-diagonal elements to be some constant "k'), without looping through the matrix? I know there is a function "diag"....was hoping to find something that does the opposite....not sucessful so far.
Thanks!
0 Comments
Accepted Answer
James Tursa
on 17 Aug 2022
You could use logical indexing to get at the off-diagonal elements. E.g.,
A(~eye(size(A))) = skalar;
More Answers (1)
Bruno Luong
on 17 Aug 2022
M = 4;
A = rand(M);
A(1:size(A,1)+1:end) = 10, % This is how you change the diagonal of A using linear indexing
See Also
Categories
Find more on Operating on Diagonal Matrices in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!