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How do I replace values in a 400x400 matrix with values of 1x1001 array (r) and then replace all r <= 0.02 with 1 and r>0.02 with 0?

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Hi,
I need to make a 400 x 400 matrix, with the values of r = [0.0001, 0.0002,......,0.1001] and then replace all r smaller or equal to 0.02 with an 1 and r bigger than 0.02 with 0.
I used this, but the matrix stays full of zeroes:
m=zeros(400,400)
for ii = 1:400
if r(ii)<0.02
m(ii) = 1;
else
m(ii) = 0;
end
end
can someone help me with this?

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