Re: [R] String manipulation and formatting

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Tue 18 Jul 2006 - 18:24:12 EST

On Tue, 18 Jul 2006, Bashir Saghir (Aztek Global) wrote:

> Thanks to Richard, Gabor and Marc for some nice solutions to my request.
>
> I have a new problem:
>
> > xify(30.10)
> [1] "XXXXXXXXXXXXXXXXXXXXXXXXXXXXX.X"
> > xify(30.11)
> [1] "XXXXXXXXXXXXXXXXXXX.XXXXXXXXXXX"
>
> The problem originates from:
>
> > as.numeric(unlist(strsplit(as.character(15.10), "\\.")))
> [1] 15 1
> > as.numeric(unlist(strsplit(as.character(15.11), "\\.")))
> [1] 15 11
>
> It seems to boils down to:
>
> > as.character(15.10)
> [1] "15.1"
>
> A simple solution is:
>
> > xify("15.10")
> [1] "XXXXX.XXXXXXXXXX"
>
> I was wondering if there is a simple way for xify to see the zero of the 10
> without having to force the user to add quotes around the format?

No, as the parser has converted '15.10' to a numeric constant.

What is the problem with asking users to enter strings as strings?

-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Tue Jul 18 18:28:32 2006

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