Re: [R] hex format

From: Duncan Murdoch <murdoch_at_stats.uwo.ca>
Date: Fri 08 Apr 2005 - 01:40:09 EST

Earl F. Glynn wrote:
> "Prof Brian Ripley" <ripley@stats.ox.ac.uk> wrote in message
> news:Pine.LNX.4.61.0504071442200.25401@gannet.stats...
>

>>On Thu, 7 Apr 2005, Steve Vejcik wrote:
>>
>>>Has anyone used hex notation within R to represents integers?

>
>
>> Short answer: yes.
>>
>>
>>>as.numeric("0x1AF0")
>>
>>[1] 6896
>>
>>(which BTW is system-dependent, but one person used it as you asked).

>
>
> I see this works fine with R 2.0.0 on a Linux platform, but doesn't work at
> all under R 2.0.1 on Windows.
>
>
>>as.numeric("0x1AF0")

>
> [1] NA
> Warning message:
> NAs introduced by coercion
>
> Seems to me the conversion from hex to decimal should be system independent

> (and makes working with colors much more convenient). Why isn't this system
> independent now?

Presumably because nobody thought it was important enough to make it so.   R isn't a low level system programming language, so why should it treat hex specially?

Duncan Murdoch



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