Re: Convert numpy array to single number

References	<088cdf75-f196-404b-ba77-567559f431d8@googlegroups.com> <bs9vipF2h3pU1@mid.individual.net>
From	Papp Győző <pappgyozo@gmail.com>
Date	2014-05-01 15:26 +0200
Subject	Re: Convert numpy array to single number
Newsgroups	comp.lang.python
Message-ID	<mailman.9632.1398970272.18130.python-list@python.org> (permalink)

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Maybe something like this?
>>> to_num = lambda array: np.sum(array * 2**np.arange(len(array)-1, -1,
-1))
>>> to_num(np.array([1,0,1,0]))
10




2014-04-29 17:42 GMT+02:00 Tom P <werotizy@freent.dd>:

> On 28.04.2014 15:04, mboyd02255@gmail.com wrote:
>
>> I have a numpy array consisting of 1s and zeros for representing binary
>> numbers:
>>
>> e.g.
>>
>>       >>> binary
>>       array([ 1.,  0.,  1.,  0.])
>>
>> I wish the array to be in the form 1010, so it can be manipulated.
>>
>> I do not want to use built in binary converters as I am trying to build
>> my own.
>>
>>
> Do you mean that each element in the array represents a power of two?
> So array([ 1.,  0.,  1.,  0.]) represents 2^3 + 2 = 6 decimal?
>
> --
> https://mail.python.org/mailman/listinfo/python-list
>

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Convert numpy array to single number mboyd02255@gmail.com - 2014-04-28 06:04 -0700
  Re: Convert numpy array to single number Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-04-28 14:16 +0000
  Re:Convert numpy array to single number Dave Angel <davea@davea.name> - 2014-04-28 15:19 -0400
  Re: Convert numpy array to single number Tom P <werotizy@freent.dd> - 2014-04-29 17:42 +0200
    Re: Convert numpy array to single number Papp Győző <pappgyozo@gmail.com> - 2014-05-01 15:26 +0200

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