[R] changing font size in plot(effect())

[John Fox]

Dear Peter,

OK -- I see that this works as advertized.

Thanks,
 John

On Fri, 26 May 2006 07:12:52 -0600
 P Ehlers <ehlers at math.ucalgary.ca> wrote:
> No, I don't think so, John. I think what I proposed is
> Deepayan's newer way of setting parameters. I used to do it the
> other way, too (S-PLUS may still need it), but I find this new
> way very handy, since it avoids the get/save/alter/set process.
> 
> Try this:
> 
> trellis.device()
> trellis.par.set(list(axis.text = list(col = "blue"))) # reset colour
> trellis.par.get("axis.text")  # inspect
> trellis.par.set(list(axis.text = list(cex = 2)))  # reset cex
> trellis.par.get("axis.text")  # inspect; colour is still 'blue'
> 
> Best wishes,
> Peter
> 
> John Fox wrote:
> 
> > Dear Peter,
> > 
> > Won't that wipe out the other components of axis.text, etc.?
> > 
> > Regards,
> >  John
> > 
> > On Thu, 25 May 2006 06:22:22 -0600
> >  P Ehlers <ehlers at math.ucalgary.ca> wrote:
> > 
> >>John Fox wrote:
> >>
> >>
> >>>Dear Emilie,
> >>>
> >>>This is, I guess, the effect() function in the effects package. If
> >>
> >>so,
> >>
> >>>note that the plot.effect() method uses trellis graphics (via the
> >>>lattice package), not standard R graphics, so you have to control
> >>>aspects of the plot in a manner consistent with trellis graphics.
> >>>
> >>>Unfortunately, you can't just specify the scales argument when you
> >>
> >>call
> >>
> >>>plot(), since plot.effect() already includes a scales argument
> when
> >>
> >>it
> >>
> >>>calls xyplot(). You can, however, set trellis parameters globally,
> >>>e.g., via something like
> >>>
> >>>axis.text <- trellis.par.get("axis.text")
> >>>par.ylab.text <- trellis.par.get("par.ylab.text")
> >>>par.xlab.text <- trellis.par.get("par.xlab.text")
> >>>axis.text$cex <- 1.5
> >>>par.ylab.text$cex <- 1.5
> >>>par.xlab.text$cex <- 1.5
> >>>trellis.par.set("axis.text", axis.text)
> >>>trellis.par.set("par.ylab.text", par.ylab.text)
> >>>trellis.par.set("par.xlab.text", par.xlab.text)
> >>>
> >>>Perhaps this can be done more efficiently -- I'm far from a
> trellis
> >>>whiz -- but the above should work.
> >>>
> >>>More generally, in designing the plot method for effect objects,
> it
> >>>wasn't my goal to produce publication-quality plots; for that, I
> >>>suggest that you build a custom graph using the information
> >>
> >>included in
> >>
> >>>the effect object.
> >>>
> >>>I hope this helps,
> >>> John
> >>
> >>Possibly a bit more efficient:
> >>
> >>trellis.par.set(list(axis.text = list(cex = 2),
> >>                      par.ylab.text = list(cex = 1.5),
> >>                      par.xlab.text = list(cex = 0.5)))
> >>
> >>Also good to know, Emilie:
> >>
> >>   trellis.par.get()
> >>
> >>to see all the things that can be (re)set. Most are
> self-explanatory.
> >>
> >>  - Peter Ehlers
> >>
> >>
> >>>On Wed, 24 May 2006 13:24:03 -0400
> >>> Emilie Berthiaume <Emilie.Berthiaume at usherbrooke.ca> wrote:
> >>>
> >>>
> >>>>I can't seem to be able to change the font size in an effect
> >>
> >>display.
> >>
> >>>>I've
> >>>>tried the following:
> >>>>
> >>>>
> >>>>
> >>>>>par(cex.lab=4)
> >>>>>plot(effect ("alti",reg8), ylab="detection probability")
> >>>>
> >>>>and
> >>>>
> >>>>
> >>>>
> >>>>>plot(effect ("alti",reg8), ylab="detection probability", cex=4)
> >>>>
> >>>>but nothing changes.  Can anyone help me?
> >>>>thanks.
> >>>>
> >>>>
> > 
> > 
> > 
> > --------------------------------
> > John Fox
> > Department of Sociology
> > McMaster University
> > Hamilton, Ontario, Canada
> > http://socserv.mcmaster.ca/jfox/
> > 
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--------------------------------
John Fox
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
http://socserv.mcmaster.ca/jfox/