Say I have a probability mass p = [p_1, p_2, ..., p_n]
over the numbers 1 to n, such that sum(p)=1
.
I want to sample a binary vector x
of length n, such that sum(x) = N
(N is known) and each component 1 to n is sampled with the probability mass p
.
What's the most efficient way of doing this? Many thanks.
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