[R] problem with plot() and POSIXt dates
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Jan 5 00:29:54 CET 2007
As the footer says
PLEASE do read the posting guide
and provide commented, minimal, self-contained, reproducible code.
We can't help you with a problem we cannot reproduce, and random guessing
is not going to be productive.
On Thu, 4 Jan 2007, COMTE Guillaume wrote:
> Hy all,
> I'm plotting graphs using plot() function, they are on X axes POSIX dates:
> "POSIXt" "oldClass" "POSIXct" "POSIXlt"
> I can't figure out why sometimes it prints the month and days and sometimes it prints the unix timestamp.
> It appens usually when the xlim is short like only some days.
> xlim is settled as a POSIXt like this
> "2006-12-30 17:25:44 CET" "2007-01-02 03:16:51 CET"
> On the graph it prints : 1167500000 and 1167700000 instead of dates.
> And the result gives a x axes in unix timestamps as if the plot function didn't recognize that it is a timestamp but just an integer.
> What am i missing, since R sees itself that it is time stamps and not integer when xlim is enougth large, how do i tell the plot function to see these numbers as POSIXt?
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> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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