Using dates for plotting
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