MATLAB: How can i make a partition matrix

fuzzy c meanskmeansMATLAB

I tried to make a mxn partition matrix that all her columns sum 1.0, i have this, but is very slow
c=5; k=3;
matrixTemp = zeros(c, k);
randoms = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9];
idx_r = zeros(1,k);
for i = 1:c
    s = 0;
     while s ~= 1
          idx_r = randperm(9,k);
           s = sum(randoms(idx_r));
     end
     matrixTemp(i,:) = randoms(idx_r);
end
It is posible more easy?
The partition matrix is the same that fuzzy c means.
I need this for example:
c1 | 0.5 0.6 0.1
c2 | 0,2 0.2 0.5
c3 | 0.3 0.2 0.4
———————-
R | 1.0 1.0 1.0 % sum each column equals to 1.0

Best Answer

If you are not interested in decimals, just add one, the solution is easy: 
c=5;
k=3;
matrixTemp=rand(c,k);
matrixTemp=matrixTemp./sum(matrixTemp)
if you want the entire matrix to have only one decimal place :
c=5;
k=3;
while true
matrixTemp=rand(c,k);
matrixTemp=matrixTemp./sum(matrixTemp);
matrixTemp=round(matrixTemp*10)/10;
if prod(prod(matrixTemp))~=0
    break;
end
end
disp(matrixTemp)
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