[R] Special characters in regular expressions

[Thierry Onkelinx]

gsub("[A|K]\\|", "", x)

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and
Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium

To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to say
what the experiment died of. ~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data. ~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

2015-09-24 11:52 GMT+02:00 Patrick Connolly <p_connolly op slingshot.co.nz>:

> I need to change a vector dd that looks like this:
> c("LBAM 5|A|15C|3h", "LBAM 5|K|15C|2h")
>
> into this:
> c("LBAM 5|15C|3h", "LBAM 5|15C|2h")
>
> It's not very imaginative, but I could use a complicated nesting of
> gsub() as so:
>
> gsub("-", "\\|", gsub("K-", "", gsub("A-", "", gsub("\\|", "-", dd))))
>
> Or I could make it a bit more readable by using interim objects,
>
> But I'd prefer to use a single regular expression that can detect "A|"
> *and* "K|" without collateral damage from the impact of special
> characters and regular characters.
>
> TIA
>
> --
> ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.
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