R help - Jun 2010 - pdf function, resize xyplot plot automatically

All,

When saving plots to a pdf file via the pdf function, I would like to be
able to automatically expand the graphics device to achieve the same result
as when one does this manually (e.g., clicking the green expand button on
the upper left of the graph on Mac OS).   Consider simple example below:


library("lattice")
foo.frm = data.frame(Subject = rep(c(1:4), each = 9), Y = rnorm(36), Time rep(c(
0, 15, 30, 45, 60, 90, 150, 210, 270), 4))
xyplot(Y ~ Time | as.factor(Subject), data = foo.frm, scale = list(x list(at =
c(0, 15, 30, 45, 60, 90, 150, 210, 270))))

The tick marks are very close but this is resolved by expanding the graphics
device as mentioned above.   However, in the code below the file that is
created by the pdf function is created w/o such an adjustment.  I suppose
one could work around this via changing the number of tick marks, but if
there was a way to automatically achieve the expansion of the graph as when
done manually that would be great.  Any tips much appreciated.


pdf(file = "foo.pdf", onefile = T)
xyplot(Y ~ Time | as.factor(Subject), data = foo.frm, scale = list(x list(at =
c(0, 15, 30, 45, 60, 90, 150, 210, 270))))
dev.off()


Thanks,
David

--------------------------------------
David Afshartous, Ph.D.
Research Assistant Professor
University of Miami, Miller School of Medicine
Division of Clinical Pharmacology
1500 N.W. 12th Avenue, 15th Floor West
Miami, Florida 33136

E-mail: afshar at med.miami.edu
Phone: +1 305-243-1549

David,

I would use either the 'width=' argument to pdf() or
use a smaller font for the x-axis (or both).
Something like:

  pdf(file = "foo.pdf", width = 10)
  xyplot(Y ~ Time | as.factor(Subject), data = foo.frm,
         layout = c(2,2),
         scale = list(x = list(
              at = c(0, 15, 30, 45, 60, 90, 150, 210, 270),
              cex = 0.7)))
  dev.off()

   -Peter Ehlers

On 2010-06-02 12:34, Afshartous, David wrote:
>
> All,
>
> When saving plots to a pdf file via the pdf function, I would like to be
> able to automatically expand the graphics device to achieve the same result
> as when one does this manually (e.g., clicking the green expand button on
> the upper left of the graph on Mac OS).   Consider simple example below:
>
>
> library("lattice")
> foo.frm = data.frame(Subject = rep(c(1:4), each = 9), Y = rnorm(36), Time
> rep(c( 0, 15, 30, 45, 60, 90, 150, 210, 270), 4))
> xyplot(Y ~ Time | as.factor(Subject), data = foo.frm, scale = list(x >
list(at = c(0, 15, 30, 45, 60, 90, 150, 210, 270))))
>
> The tick marks are very close but this is resolved by expanding the
graphics
> device as mentioned above.   However, in the code below the file that is
> created by the pdf function is created w/o such an adjustment.  I suppose
> one could work around this via changing the number of tick marks, but if
> there was a way to automatically achieve the expansion of the graph as when
> done manually that would be great.  Any tips much appreciated.
>
>
> pdf(file = "foo.pdf", onefile = T)
> xyplot(Y ~ Time | as.factor(Subject), data = foo.frm, scale = list(x >
list(at = c(0, 15, 30, 45, 60, 90, 150, 210, 270))))
> dev.off()
>
>
> Thanks,
> David
>
> --------------------------------------
> David Afshartous, Ph.D.
> Research Assistant Professor
> University of Miami, Miller School of Medicine
> Division of Clinical Pharmacology
> 1500 N.W. 12th Avenue, 15th Floor West
> Miami, Florida 33136
>
> E-mail: afshar at med.miami.edu
> Phone: +1 305-243-1549
>

On Wed, 02-Jun-2010 at 02:34PM -0400, Afshartous, David wrote:

|> 
|> All,
|> 
|> When saving plots to a pdf file via the pdf function, I would like to be
|> able to automatically expand the graphics device to achieve the same
result
|> as when one does this manually (e.g., clicking the green expand button on
|> the upper left of the graph on Mac OS).   Consider simple example below:

If it's a file you want to keep, it makes more sense IMHO to keep a
record of just what you did to get the size you want.  For that
reason, it's a better idea to set the width &/or height in the call to
pdf().  Peter Ehlers has told you how to use the 'width' argument.

For interactive use, the normal X11 window can be resized in the way
you would probably like.  I quite like the way R offers you two quite
different ways of doing such things.

[...]

HTH

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