[Rd] Re: undocumented behaviour of recordPlot (PR#578)
Fri, 23 Jun 2000 09:10:24 +0200 (MET DST)
On Thu, Jun 22, 2000 at 05:01:32PM +0200, firstname.lastname@example.org wrote:
> I think this is pretty certainly a bug, so I'm cc'ing this to r-bugs.
> Kaspar Pflugshaupt <email@example.com> writes:
> > As the documentation states, when I generate a plot and save it with
> > recordPlot, I can regenerate it by printing the variable:
> > > plot(1:10)
> > > abline(h=5)
> > > abline(v=5)
> > > t.plot<-recordPlot()
> > > t.plot
> > works perfectly.
> > Now, if I add further elements to this (regenerated) plot, they get drawn
> > all right (I tested only abline()), which surprised me . But when I re-save
> > the result, only the new additions get saved:
> > > abline(h=9) # works (to my surprise)
> > > t.plot2<-recordPlot # saves only the addition, as can be seen by:
> > > str(t.plot2)
> > OK, so I thought I might regenerate the combined plot by
> > > t.plot # worked
> > > t.plot2 # cleared graph, but did nothing
The problem is that main/plot.c:do_playDL doesn't set the device
diplay list. Inserting towards the beginning a line like
dd->dipslayList = theList;
works for me at least under Unix. I will commit it after testing
BTW, Kaspar, I have no Windows at hand in this moment but
does the problem manifest itself also with the plot history mechanism?
E.g., (i) if you set (with the menu) the graphics window in
'recording mode', (ii) make some plots , (iii) go back to the
first plot using 'PgUp', (iv) add some new elements to it and
(v) go to some other plot and then back to the first plot
with 'PgDown' and 'PgUp', the first plot you get is the modified one
or not? Reason of the question is that replayng of the saved history
is implemented in a different way.
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