Message-ID: <4007DFB5.27124.ED4E1F@localhost>
Date: 2004-01-16T11:57:25Z
From: PIKAL Petr
Subject: Using dates for plotting
In-Reply-To: <20040116110143.GA15498@sesame.kyb.local>
Hi
On 16 Jan 2004 at 12:01, Christoph Lange wrote:
>
> Dear R-Users!
>
> I have the following data:
>
> > runs
> dates kms
> 1 2004-01-15 12:00:00 9
> 2 2004-01-16 12:00:00 10
> 3 2004-01-17 12:00:00 5
> > class(runs$dates)
> [1] "POSIXt" "POSIXct"
> >
>
> Is it possible to _easily_ plot these data with real dates shown as
> tick marks on the x-axis? Perhaps even when the days are not
> continuous but with missing days in between?
plot(dates,kms)
should work, but you need to do some formating (maybe with
axes=F and axis())
see ?strptime
and to convert your dates to POSIXct gformat
^^
Beware "dates" is a function name in library chron.
HTH Petr
>
> Thanks in advance,
>
> Christoph.
>
> --
> Christoph Lange
> MPI fuer biologische Kybernetik |Phone: +49-7071-601-607|
> Postfach 2169, D-72012 Tuebingen |FAX: +49-7071-601-616|
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
Petr Pikal
petr.pikal at precheza.cz