How do i select a random cell with a certain value from the matrix

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Antonio Sarusic
Antonio Sarusic 2020-3-27
评论： Adam Danz 2020-3-27
Hello,
I have a 1024x1280 matrix that only has the values 0 and 1.
Now I want to randomly select a cell that has the value 1.
Anybody got an idea how to do that?
Thanks

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Adam Danz
Adam Danz 2020-3-27
编辑：Adam Danz 2020-3-27
% Create matrix of 0s & 1s
M = round(rand(1024, 1280));
% List all indices of 1s
loc = find(M==1);
% Randomly select one of the indices
randInd = datasample(loc, 1); % or randInd = loc(randi(numel(loc)))
% Show the row and col number of the selection
[row, col] = ind2sub(size(M), randInd);

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