I am newbie in Python. I think I'm looking for something easy, but can't find. I have an numpy binary array, e.g.:
[1,0,1,1,0,0,0,1,1,1,1,0]
And I want to do 2 things:
Join (?) all elements into one number, so result will be:
x=101100011110
Next want to converse it into binary, so:
xx=2846
I have an algorithm to do 2., but I don't know how to do 1. I can do it using loop, but is it possible to do it using numpy, without loop? My array will be huge, so I need the best option.
>>> int(''.join(map(str, [1,0,1,1,0,0,0,1,1,1,1,0])))
101100011110
Or with a little numpy:
>>> int(''.join(np.array([1,0,1,1,0,0,0,1,1,1,1,0]).astype('|S1')))
101100011110
I like @timgeb's answer, but if you're sure you want to use numpy calculations directly, you could do something like this:
x = np.array([1,0,1,1,0,0,0,1,1,1,1,0])
exponents = np.arange(len(x))[::-1]
powers = 10**exponents
result = sum(powers * x)
In [12]: result
Out[12]: 101100011110
As pointed out by @Magellan88 in the comments, if you set powers=2**exponents you can get from 0 to your second part of the question in one sweep.
Since you don't want loop in first task then you can go with map method , I just wanted to show you can also try this :
import numpy as np
array=np.array([1,0,1,1,0,0,0,1,1,1,1,0])
int_con=str(array).replace(',','').replace(' ','').replace('[','').replace(']','')
print("Joined {}".format(int_con))
bin_to_de=0
for digit in int_con:
bin_to_de=bin_to_de*2+int(digit)
print("Decimal conversion {}".format(bin_to_de))
output:
Joined 101100011110
Decimal conversion 2846
