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How to create such a matrix like this?

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Taner Cokyasar
Taner Cokyasar 2016-7-13
评论： Taner Cokyasar 2016-7-13
Hello,
I need to create a matrix as following:
Number of the rows depend on 'i', where i=3 and number of columns depend on i*s, where s=12 in this example.
There are 12 ones in each row(in this example), all others are zero.
1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1
I need a code to generate this matrix appropriate for all i and s values.
Thanks for help!

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the cyclist
the cyclist 2016-7-13
i = 3;
s = 12;
M = zeros(i,i*s);
for n = 1:i
M(n,(n-1)*s+1:n*s) = 1;
end

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