[Rd] par(ask=T) in termplot() (PR#711)

[Prof Brian D Ripley]

Thank you, now incorporated in R-devel.

On Fri, 27 Oct 2000 paradis@isem.univ-montp2.fr wrote:

> At 11:57 25/10/00 +0100, Brian Ripley wrote:
> >> Date: mer., 25 oct. 2000 12:38:55 +0200
> >> From: Emmanuel Paradis <paradis@isem.univ-montp2.fr>
> >
> >> I think it would be nice to have par(ask=T) set by default in termplot(),
> >> like it is in plot.lm().
> >
> >Well, it isn't really the default in plot.lm, the default for `ask' being
> >
> >interactive() && one.fig && length(which) > 1 && .Device != "postscript"
> >
> >Can you supply us with an appropriate patch for termplot and
> >termplot.Rd?  The issue is somewhat subtle.
> 
> So plot.lm() sets 'ask=F' if, eg, par(mfcol=c(2,1)) so that the first 2
> plots cannot be really visualized. Here is a proposed modification for this
> function:
> 
> $ diff plot.lm.R plot.lm.new.R
> 7c7
> <          ask = interactive() && one.fig && length(which) > 1
> ---
> >          ask = interactive() && nb.fig < length(which)
> 52a53
> >    nb.fig <- prod(par("mfcol"))
> 
> 
> 
> The modification for termplot() follows in the same way:
> 
> $ diff termplot.R termplot.new.R
> 3a4,5
> >                      ask = interactive() && nb.fig < n.tms
> >          	     && .Device != "postscript",
> 46a49,55
> >     nb.fig <- prod(par("mfcol"))
> >     one.fig <- prod(par("mfcol")) == 1
> >     if (ask) {
> > 	op <- par(ask = TRUE)
> > 	on.exit(par(op))
> >     }
> >     ##---------- Do the individual plots : ----------
> 
> 
> I have tested both with R-1.1.1 under WinNT and Solaris2.7, and they seem
> to work OK. The corresponding modifications for the .Rd files are:
> 
> $ diff plot.lm.Rd plot.lm.new.Rd
> 11c11
> <         ask = interactive() && one.fig && length(which) > 1
> ---
> >         ask = interactive() && one.fig && nb.fig < length(which)
> 
> $ bdiff termplot.Rd termplot.new.Rd
> 11a12,13
> >          ask = interactive() && one.fig && nb.fig < length(which)
> >          	&& .Device != "postscript",
> 28a31,32
> >   \item{ask}{logical; if \code{TRUE}, the user is \emph{ask}ed before
> >     each plot, see \code{\link{par}(ask=.)}.}
> 
> 
> Emmanuel Paradis
> 
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-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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