[Rd] on.exit(par(old.par)) warnings

[Paul Gilbert]

Prof Brian Ripley wrote:
> 
> >From the help page's examples section
> 
>      ## Alternatively,
>      op <- par(no.readonly = TRUE) # the whole list of settable par's.
>      ## do lots of plotting and par(.) calls, then reset:
>      par(op)
> 
> and no, it's not new and it is not a mistake (in R).

Brian, Marc

Thanks, and sorry. Now I remember I was ignoring this because of S.

Paul Gilbert

> On Mon, 12 May 2003, Paul Gilbert wrote:
> 
> > I often use something like
> >
> >   old.par <- par(set someting)
> >   on.exit(par(old.par))
> >
> > but in R 1.7.0. I now get warnings:
> 
> Note: that's not the same thing as the previous usage.
> 
> > > old.par <- par()
> > > par(old.par)
> > Warning messages:
> > 1: parameter "cin" can't be set in: par(args)
> > 2: parameter "cra" can't be set in: par(args)
> > 3: parameter "csi" can't be set in: par(args)
> > 4: parameter "cxy" can't be set in: par(args)
> > 5: parameter "din" can't be set in: par(args)
> > 6: gamma cannot be modified on this device in: par(args)
> >
> > Is this a mistake or a new feature? If it is a new feature, is there a simple
> > way to avoid the warnings?
> 
> --
> 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)
> 1 South Parks Road,                     +44 1865 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
> 
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