Randomly assign a value to each column of a matrix

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Peter Harrington
Peter Harrington 2019-6-17
编辑： dpb 2019-6-18
I can't figure out why this code doesn't work. I would like to have one true value in each row that is randomly assigned to a column like so
[1 0 0;
0 1 0;
1 0 1;
0 0 1]
mt = 5;
npart = 3;
seqS = false(mt, npart);
t = randi([1, 3], mt, 1);
seqS(:, t) = true; %should work, why not?
Thanks in advance,
Pete

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采纳的回答

dpb
dpb 2019-6-18
Not way subscript expansion works as written...use
seqS(sub2ind(size(seqS),[1:mt].',t)) = true;
instead
  2 个评论
dpb
dpb 2019-6-18
编辑：dpb 2019-6-18
No problem, glad to help...it's one of those syntax things that superficially does look like should work as you expected but doesn't.
If would, go ahead and Accept answer if for no other reason to indicate to others there is a solution to the question. (And, while I never started this with the intent of garnering points, as of this instant, you'd be the one to hit the 10K mark... :) )

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