Formatting POSIXt values in plot axis labels
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().
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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
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