Error using randi Size inputs must be scalar (Matlab)

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high speed
high speed 2021-4-12
评论： Jan 2021-4-13
I have entries parameters A and B, and I have to obtain C with for loop, where C is the random subset of B of size Ai
I program this
for i=1:n
C=randi([0,1],B,A(i));
end
But I get the error (Error using randi ==> inputs must be scalar)
How can I fixe the problem

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Jan
Jan 2021-4-12
编辑：Jan 2021-4-12
"C is the random subset of B of size Ai" :
for i = 1:n
% Without repetitions:
C = B(randperm(numel(B), A(i)));
% Or with repetitions:
C = B(randi([1, numel(B)], 1, A(i)));
... use C now
end
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high speed
high speed 2021-4-13
@Jan Unfortunately, that's not what I want. Because I must program in a way that C is the random subset of B of size Ai. And in your example you didn't consider the size Ai
Jan
Jan 2021-4-13
@high speed: Sorry, what? Yes, in my example, I've used 4 to clarify what "repetition" means. You have asked for this detail. But the code in my answer does contain A(i).

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