Dates? was Re: [R] Dates on Graphics

[Yves Gauvreau]

Thanks for the work around.

I also check with date strings of the same format but for year 98 and 99
("19-May-98") and I get correct results. So could this be a bug?

YG


----- Original Message -----
From: "Peter Malewski" <p.malewski at tu-bs.de>
To: "Yves Gauvreau" <cyg at sympatico.ca>
Cc: "Thomas Lumley" <thomas at biostat.washington.edu>; "r-help"
<r-help at stat.math.ethz.ch>
Sent: Wednesday, June 07, 2000 4:37 PM
Subject: Re: Dates? was Re: [R] Dates on Graphics


> Something like (!this is a quick make + it is very late "afternoon"):
>
>
> > xd<-c("19-May-00", "22-May-00", "23-May-00", "24-May-00", "25-May-00")
> > xx <- unlist(strsplit(xd,"-"))
> > dim(xx) <- c(3,length(xx)/3)
> > xx <- t(xx)
> > xx[xx[,3]=="00",3] <- "2000"
> > xd <- apply(xx,1,paste,collapse="-")
> > xd
> [1] "19-May-2000" "22-May-2000" "23-May-2000" "24-May-2000" "25-May-2000"
>
> Peter
>
>
>
> On Wed, 7 Jun 2000, Yves Gauvreau wrote:
>
> > Hi,
> >
> > I tried a few things with the date package and this is one of the result
I
> > get.
> >
> > xd<-c("19-May-00", "22-May-00", "23-May-00", "24-May-00", "25-May-00")
> > > as.date(xd)
> > [1] NA NA NA NA NA
> >
> > xd<-c("19-May-2000", "22-May-2000", "23-May-2000", "24-May-2000",
> > "25-May-2000")
> > > as.date(xd)
> > [1] 19May2000 22May2000 23May2000 24May2000 25May2000
> >
> > Any suggestion on how to word around this little problem? Note that this
is
> > a small sample, I would not like to have to do these corrections to
hundreds
> > of dates manualy.
> >
> > Thanks in advance
> >
> > YG
> >
> >
> > ----- Original Message -----
> > From: "Thomas Lumley" <thomas at biostat.washington.edu>
> > To: "Yves Gauvreau" <cyg at sympatico.ca>
> > Cc: "r-help" <r-help at stat.math.ethz.ch>
> > Sent: Wednesday, June 07, 2000 12:41 PM
> > Subject: Re: [R] Dates on Graphics
> >
> >
> > > On Wed, 7 Jun 2000, Yves Gauvreau wrote:
> > >
> > > > Thanks for your prompt reply.
> > > >
> > > > I just want to point something out. I already had the date package
> > loaded
> > > > and when I tried help(plot.date) I got "Error in help(plot.date) :
No
> > > > documentation for `plot.date'". There is no mention of it either in
the
> > > > index of the package (date) in fact it's not mentioned anywhere
except
> > in
> > > > the source. I don't think this can be called a bug but it would be
nice
> > to
> > > > be able to find minimal documentation on this function.
> > >
> > > I could say that you might expect to get formatted dates when using
plot()
> > > on a date object, but in fact you are completely correct and I need to
> > > update the documentation on the date package.
> > >
> > >
> > > > This situation bring me to think that it would be nice to have a way
to
> > find
> > > > information even when you don't know if it exist, some kind of
> > searchable
> > > > index. At this time I do this kind of search using the html search
> > > > facilities. Is there some other way that one could this?
> > >
> > > Some of this can be done with apropos(), but I don't think you can
keyword
> > > search from inside R. It would be nice.
> > >
> > >
> > > Thomas Lumley
> > > Assistant Professor, Biostatistics
> > > University of Washington, Seattle
> > >
> > >
> >
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