I would like some help with coverting a matrix that is generated randomly to a binary matrix

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Nir Vaishnav 2022-8-22

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评论： Nir Vaishnav 2022-8-22

This is a distance matrix which generates random number for every iteration. Is it possible to generate a binary matrix which has ones in place of the lowest 2 values in each row and zeros everywhere else? Can i please get some help with that?

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Nir Vaishnav 2022-8-22

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Answer 1

Chunru 2022-8-22

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在 MATLAB Online 中打开

d = rand(4,4)          % random data 
d = 4×4
    0.3227    0.2997    0.6497    0.7723
    0.2227    0.7284    0.6703    0.8356
    0.3157    0.4773    0.7145    0.0510
    0.4854    0.4051    0.6248    0.5357
y = zeros(size(d));
for i=1:size(d, 1)
    [~, idx] = sort(d(i, :));  % sort in asencing order 
    y(i, idx(1:2)) = 1;
end
y
y = 4×4
     1     1     0     0
     1     0     1     0
     1     0     0     1
     1     1     0     0