Error when generating a for loop with unifrnd

I have to generate 1000 times 12 numbers with values between 0 and 6. I've tried to write this scrpt but there is an error:

a = 0; b = 1:6;
for i = 1:1000;
r(i) = unifrnd(a,b(6),1,12)
end
The error is: In an assignment  A(I) = B, the number of elements in B and I must be the same.

Answer 1

[Dennis]

r(i) only has 1 field and you try to store 12 values. Try

a = 0; b = 1:6;
r=zeros(1000,12);
for i = 1:1000;
r(i,:) = unifrnd(a,b(6),1,12);
end

[EM geo]

really thanks!!