[R] Convert bits to numbers in base 10

Gang Chen gangchen6 at gmail.com
Fri Apr 10 00:00:46 CEST 2009


Yes, such a concise and elegant solution!

Thanks a lot!

Gang

On Thu, Apr 9, 2009 at 5:51 PM, Marc Schwartz <marc_schwartz at me.com> wrote:
> I suspect that Gang was looking for something along the lines of:
>
>> sum(2 ^ (which(as.logical(rev(nn))) - 1))
> [1] 74
>
> You might also want to look at the digitsBase() function in Martin's sfsmisc
> package on CRAN.
>
> HTH,
>
> Marc Schwartz
>
> On Apr 9, 2009, at 4:34 PM, Jorge Ivan Velez wrote:
>
>> Dear Gang,
>> Try this:
>>
>> nn <- c(1, 0, 0, 1, 0, 1,0)
>> paste(nn,sep="",collapse="")
>>
>> See ?paste for more information.
>>
>> HTH,
>>
>> Jorge
>>
>>
>> On Thu, Apr 9, 2009 at 5:23 PM, Gang Chen <gangchen6 at gmail.com> wrote:
>>
>>> I have some bits stored like the following variable nn
>>>
>>> (nn <- c(1, 0, 0, 1, 0, 1,0))
>>> [1] 1 0 0 1 0 1 0
>>>
>>> not in the format of
>>>
>>> 1001010
>>>
>>> and I need to convert them to numbers in base 10. What's an easy way to
>>> do
>>> it?
>>>
>>> TIA,
>>> Gang
>
>




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