[Rd] ylab in time series plot (PR#2869)
kademan at phz.com
Tue Apr 29 14:35:29 MEST 2003
Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:
> On 29 Apr 2003, Ed Kademan wrote:
> > Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:
> > > And the bug is?
> > >
> > > You got a correct plot, with a correct warning.
> > >
> > > On Mon, 28 Apr 2003 kademan at phz.com wrote:
> > >
> > > > You get a warning message when you specify a ylab parameter while
> > > > plotting data whose x's are POSIXct values. Apparently the
> > > > `axis.POSIXct' method tries to reset the ylab---via the ...
> > > > parameter---after it has already been set by higher level methods.
> > No. The bug is that the warning is incorrect.
> > How do you specify a ylab parameter to a time series plot without
> > generating a warning?
> [This is not a time-series plot! You are plotting against a date-time
> object, and this has nothing to do with a time series: the object does not
> even have to be in data order.]
> You are not able to, but nowhere is it stated that you can -- so it is not
> a bug.
When I look up the manual page for `axis.POSIXct' I get the following:
Functions to plot objects of classes "POSIXlt" and "POSIXct"
representing calendar dates and times.
plot(x, y, xlab = "", ...)
axis.POSIXct(side, x, at, format, ...)
A date-time object.
numeric values to be plotted against x.
a character string giving the label for the x axis.
...rther arguments to be passed from or to other methods, typically graphical parameters.
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