On Tue, 2010-04-20 at 10:24 +0200, Karsten Rincke wrote:> Hello,
> I'm starting working myself in the use of R, reading M. J. Crawley, The
> R Book. The problem I do encounter is concerning the commands apropos
> and find:
>
> > apropos(edit)
> Fehler: is.character(what) is not TRUE
> > find(edit)
> Fehler: is.character(what) is not TRUE
>
> I get the same error message typing anything else instead of
"edit".
>From ?apropos
Usage:
apropos(what, where = FALSE, ignore.case = TRUE, mode = "any")
find(what, mode = "any", numeric = FALSE, simple.words = TRUE)
Arguments:
what: character string with name of an object, or more generally a
regular expression to match against.
And edit is not a character string but "edit" is. Hence the very clear
error.
> The command ?edit seems to work well.
>From ?"?"
Usage:
?topic
type?topic
Arguments:
topic: Usually, a name or character string specifying the topic for
which help is sought.
Alternatively, a function call to ask for documentation on a
corresponding S4 method: see the section on S4 method
documentation. The calls ?pkg::topic? and ?pkg:::topic? are
treated specially, and look for help on ?topic? in package
?pkg?.
Hence `?` allows a wider range of object types for it's argument topic.
> What could be the reason for that I can't use apopos and find?
You aren't providing a character a string. Not sure where you got the
usage you are using from, but it is wrong. The docs are quite clear
here.
HTH
G
> Thanks for your help!
>
> ______________________________________________
> 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.
--
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
Dr. Gavin Simpson [t] +44 (0)20 7679 0522
ECRC, UCL Geography, [f] +44 (0)20 7679 0565
Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk
Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/
UK. WC1E 6BT. [w] http://www.freshwaters.org.uk
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%