MATLAB: How to generate a random matrix with 0’s and 1’s

random matrixzeros and ones

Any help on generating a random matrix populated with zeros and ones, having exactly d =m/s ones per column, the locations of which are chosen uniformly from [m] without replacement. where m is the number of rows and s is from {1,…,m}. d must be an integer.

I have tried using randerr(m,n,d) but I can not get the desired output. Thanks

Best Answer

cell2mat(arrayfun(@(~) (randperm(m) <= d)', 1:n, 'UniformOutput', false))

would be one way.

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MATLAB: Generating random values from another matrix with a random value in rows only

Is something like this what you want? Randomly distributed values from X but staying in same column?

X = whatever
rows = desired number of rows of the result B
[M,N] = size(X);
B = X(bsxfun(@plus,randi(M,rows,N),M*(0:N-1)));

MATLAB: How to make a rectangular mask of 1’s

Assuming you mean centered around the middle ROW:

% Initialize to all zeros.
mask = zeros(768, 1024);
topRow = floor(768/2 - k/2); % Find the top row.
% Assign the 1's.
mask(topRow:(topRow+k-1),:) = 1;

Since the 1's go all the way across all 1024 columns, you don't really have centering or not centered when you're talking about the columns.

Best Answer

Related Solutions

MATLAB: Generating random values from another matrix with a random value in rows only

MATLAB: How to make a rectangular mask of 1’s

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