R help - Feb 2003 - Lattice not plotting within loop

Something I don't understand ... (!)

With the lattice library loaded, I have a loop

  for( Z in ... ) {
  ...
  xyplot(y~x | t, xlab=..., ylab=... )
  }

and no plot appears on the R graphics device.
However, when I run the commands within {...}
separately for each instance of Z, I get the
plot displayed each time.

So it looks as though "xyplot" is not outputting
to the graphics display when invoked within a loop.

What am I mising?

With thanks,
Ted.


--------------------------------------------------------------------
E-Mail: (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk>
Fax-to-email: +44 (0)870 167 1972
Date: 03-Feb-03                                       Time: 12:35:02
------------------------------ XFMail ------------------------------

This discussed almost daily.

You *print* a trellis/lattice plot, and no printing is done in your 
example.

On Mon, 3 Feb 2003 Ted.Harding at nessie.mcc.ac.uk wrote:
> Something I don't understand ... (!)
It's in all good books on S/R ....
> With the lattice library loaded, I have a loop
> 
>   for( Z in ... ) {
>   ...
>   xyplot(y~x | t, xlab=..., ylab=... )
>   }
> 
> and no plot appears on the R graphics device.
> However, when I run the commands within {...}
> separately for each instance of Z, I get the
> plot displayed each time.
> 
> So it looks as though "xyplot" is not outputting
> to the graphics display when invoked within a loop.
It never does.  print.trellis does the outputting.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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