how to convert a binary numpy array to decimal? [duplicate]

Question

I want to convert binary numpy array to decimal. Is there a similar function to this numpy.binary_repr that works the other way around?

x = array([ 1., 1., 0., 1., 0., 0., 0., 1., 0.])

I know I can do this:

int("110100010",2) = 418

But here I need to extract the elements of the array and put them into string? Is there an easier way? if not, then how can I extract the elements of the array and create a string out of them?

Sunitha · Accepted Answer · 2018-08-05 21:02:24Z

1

You can use reduce

>>> from functools import reduce
>>> reduce(lambda a,b: 2*a+b, x)
418.0

Alternatively, as you said, you can construct a string and then convert it to int (base 2)

>>> int(''.join(map(lambda x: str(int(x)), x)), 2)
418

edited Aug 5, 2018 at 21:02

answered Aug 5, 2018 at 20:55

Sunitha

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