[R] Obtain the hex code for a given character.

[David Winsemius]

On Feb 4, 2014, at 8:56 PM, David Winsemius wrote:

> 
> On Feb 4, 2014, at 4:57 PM, Rolf Turner wrote:
> 
>> 
>> 
>> If I have a character such as "£" stored in a object called "xxx", how can I obtain the hex code representation of this character?  In this case I know that the hex code is "\u00A3", but if I didn't, how would I find out?
>> 
>> I would like a function "foo()" such that foo(xxx) would return, say, the string "00A3".
>> 
> 
> Close:
> 
>> as.hexmode(utf8ToInt("£"))
> [1] "a3"
> 

Looking at the help page again I realized that there was a `format.hexmode` to deliver as requested:

> format(as.hexmode(utf8ToInt("£")), width=4, upper=TRUE)
[1] "00A3"

-- 
David.

> 
>> I have googled and otherwise searched around and have come up with nothing that seemed at all helpful to me.  If I am missing something obvious, please point me at it.
>> 
>> (I have found a table on the web, which contains the information that I need, but it is only accessible "by eye" as far as I can discern.)
>> 
>> Supplementary question:  Suppose I have the string "00A3" stored in
>> an object called "yyy".
> 
> 
>> intToUtf8(as.hexmode('00A3'))
> [1] "£"
> 
> 
>> How do I put that string together with "\u"
>> so as to obtain "£"?  I thought I could do
>> 
>> 	xxx <- paste("\u",yyy,sep="")
>> 
>> but R won't let me use "\u" "without hex digits".  How can I get around this?
>> 
>> Thanks.
>> 
>> cheers,
>> 
>> Rolf Turner
>> 
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> 
> David Winsemius
> Alameda, CA, USA
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

David Winsemius
Alameda, CA, USA