[R] Using dates for plotting

[Petr Pikal]

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|
> 
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Petr Pikal
petr.pikal at precheza.cz