Message-ID: <20020806083215.A13205@camille.indigoindustrial.co.nz>
Date: 2002-08-05T20:32:15Z
From: Jason Turner
Subject: Formatting POSIXt values in plot axis labels
In-Reply-To: <3D4EECBB.89484E33@cornell.edu>; from RML27@cornell.edu on Mon, Aug 05, 2002 at 02:23:07PM -0700
On Mon, Aug 05, 2002 at 02:23:07PM -0700, Ronnen Levinson wrote:
> Hello.
>
> I have an XYY series that I would like to graph with matplot() or some
> other single function that will do the trick.
> The X in question is a vector of POSIXt values obtained from strptime().
>
...
> Is there a way for me to give plot() and/or
> matplot() formatting instructions for POSIXt values?
>
Yup. In two steps...
1) plot, but without a labeled x-axis (x.stuff should have
class "POSIXct"):
matplot(x.stuff, y.stuff, xaxt="n")
2) you can now use axis.POSIXct()
And a very nice function it is. You can tell it where to put
the ticks (if you don't find the defaults appropriate), and what
format to display the dates.
Cheers
Jason
--
Indigo Industrial Controls Ltd.
64-21-343-545
jasont at indigoindustrial.co.nz
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