[R] ?plot problem

[Hotz, T.]

> -----Original Message-----
> From: Prof Brian Ripley [mailto:ripley at stats.ox.ac.uk]
> Sent: 23 June 2003 22:35
> To: Paul, David A
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] ?plot problem
> 
> 
> On Mon, 23 Jun 2003, Paul, David  A wrote:
> 
> > R1.7.0, Win2k:
> > 
> > When I use plot( ) on a groupedData object,
> > if I have 165 subjects I'm supposed to be able
> > to use plot(..., layout = c(5,3,11)) to get
> > all 165 on 11 separate sheets.  The graphics
> > window is only displaying the first 10.  If I
> > use plot(..., layout = c(5,3,12)) I get the 
> > appropriate 11 sheets.
> > 
> > Furthermore, yesterday I noticed that when using
> > plot( <linear model object> ) along with the
> > "record" feature, after using "Page Up" to scroll
> > up through the graphs, I was unable to scroll
> > back down to the last (fourth) graph to see
> > the Cook's Distance plot, though the first three
> > plots remained "scollable".
> > 
> > What is going on?  Does R for Windows have issues
> > with the last plot in a series of plots?
> 
> Perhaps recording does, as people have reported similar things, but
> neither Duncan nor I could reproduce them.  I've just tried several
> plot.lm examples, and it worked flawlessly.  We can't help you further
> unless you can produce reproducible examples.

I can reproduce this behaviour which has been discussed several
times on this list as far as I remember.

After turning plot history on, execute

> plot(lm(I(sin(1:10)~I(1:10))))

and have a look at all plots.

If you then step back using PgUp, and step forward again with PgDn,
the last plot can't be reached. This is because it was never finished;
R plots don't know whether you still want to add something, so this plot
hasn't been "saved" yet. The solution is to "add" the plot first,
using INS (or History_Add), or create another plot, or,... That finishes
the plot, and makes it available in the history.

Hope that helps.

Thomas

> version
         _              
platform i386-pc-mingw32
arch     i386           
os       mingw32        
system   i386, mingw32  
status                  
major    1              
minor    7.0            
year     2003           
month    04             
day      16             
language R  

---

Thomas Hotz
Research Associate in Medical Statistics
University of Leicester
United Kingdom

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