Basically, I want to generate a boolean array with given length but the content is randomly given.
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Possible duplicate of Create large random boolean matrix with numpyKristianmitk– Kristianmitk2019-09-18 17:09:55 +00:00Commented Sep 18, 2019 at 17:09
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2 Answers
A faster implementation would be
from numpy.random import default_rng
size = 100_000
rng = default_rng()
rng.integers(0, 1, size, endpoint=True, dtype=bool)
On my machine
%timeit rng.integers(0, 1, size, endpoint=True, dtype=bool)
124 µs ± 595 ns per loop (mean ± std. dev. of 7 runs, 10,000 loops each)
%timeit rng.choice(a=[False, True], size=size)
937 µs ± 3.93 µs per loop (mean ± std. dev. of 7 runs, 1,000 loops each)
Note that I used the new random generator, instructions here.
