[R] ASCII characters: from decimal code to R octal?

[Henrik Bengtsson]

I was looking at the same problem/question last year (r-help May 09, 2001)
and what I ended up doing was what you suggests: a lookup table. See

   http://www.r-project.org/nocvs/mail/r-help/2001/2452.html

for a cut-n-paste complete solution, which I use myself.

I believe you could also to something like

octToChar <- function(octal) {
  code <- paste("\"\\", octal, "\"", sep="");
  eval(parse(text=code))
}

Except from fact that this example is not where robust ('octal' is
actually decimal), it is probably not very efficient.

Cheers

Henrik Bengtsson

Dept. of Mathematical Statistics @ Centre for Mathematical Sciences 
Lund Institute of Technology/Lund University, Sweden (+2h UTC)
Office: P316, +46 46 222 9611 (phone), +46 46 222 4623 (fax)
h b @ m a t h s . l t h . s e
http://www.maths.lth.se/matstat/staff/hb/



On Mon, 4 Feb 2002, David Firth wrote:

> Is there a straightforward way to convert character information from 
> decimal representation to the octal one used by R?
> 
> I'd like something like a function ascii(number,base=10), such that
> 
> >  ascii(91)
> [1] "\133"
> 
> I can easily do the mapping from 91 to 133, but what is a good way to 
> operate on  133 to deliver "\133"?
> 
> Would a lookup table be a better solution?
> 
> David
> -- 
> 
> 
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