[Rd] A couple of issues with colClasses/setAs
p.dalgaard at biostat.ku.dk
Wed Sep 8 16:38:58 CEST 2004
Peter Dalgaard <p.dalgaard at biostat.ku.dk> writes:
> To make it actually work, we should probably fixup the "what" that is
> being passed to scan a bit further upstreams.
> > Might be a good idea to teach colClasses about "factor".
> That's what I thought. Other ideas would be to predefine some standard
> date classes (it's a bit annoying that there's no way to give
> auxiliary information like formats), and maybe to allow a second
> header line containing class names.
Done already, I see (except the class-header idea, which probably
requires more thought). Thanks.
While we're in there should we perhaps consider adding pseudo-classes
etc? Or perhaps it is better with a catchall "Date-fmt", i.e., e.g.,
"Date-%Y%m%d"? That'd be fairly easy to code:
else if (length(grep("^Date-",colClasses[i])))
as.Date(data[[i]], sub("^Date-(.*)$","\\1", colClasses[i]))
although perhaps not so easy to document concisely.
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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