Re: [R] problem with plot() and POSIXt dates

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Thu 04 Jan 2007 - 23:29:54 GMT

As the footer says

   PLEASE do read the posting guide
   http://www.R-project.org/posting-guide.html    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?
>
> thks.
>
>
> [[alternative HTML version deleted]]
>
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> 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@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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Received on Fri Jan 05 10:35:47 2007

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