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Randomly assign a value to each column of a matrix

Peter Harrington さんによって質問されました 2019 年 6 月 17 日
最新アクティビティ dpb
さんによって 編集されました 2019 年 6 月 18 日
さんの 回答が採用されました
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,

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1 件の回答

回答者: dpb
2019 年 6 月 18 日

Not way subscript expansion works as written...use
seqS(sub2ind(size(seqS),[1:mt].',t)) = true;

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Peter Harrington 2019 年 6 月 18 日
Thanks for the help, your code works great!
2019 年 6 月 18 日
No problem, glad to'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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