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

**Emmanuel Paradis
**
paradis@isem.univ-montp2.fr

*Fri, 27 Oct 2000 14:47:41 +0200*

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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