Par and the size of the page

Hi

I've been trying, without much success, to change the properties of the
device on the Windows (1.3.0) version of R.  What I'm trying to do is move
the plots further away from each other on the device (which will hopefully
translate to the same on the printout) and get the top plot closer to the
top and the bottom closer to the bottom.

I've sized the device to 8.5x11 using

windows(width=8.5, height=11)
split.screen(c(2,1))
screen(1)
x <- 1:10
plot(x)

screen (2)
plot(x)

I just cannot get these two plot away from each other on the screen or
printout.

Any thoughts?

A couple of things you could try ...

(i)  Use the par(mar) to increase the margins around the plots.  For
example,

split.screen(c(2,1))
screen(1)
par(mar=c(10, 5, 4, 2))
x <- 1:10
plot(x)
box("figure", lty="dashed")
screen (2)
par(mar=c(5, 5, 10, 2))
plot(x)
box("figure", lty="dashed")
close.screen(all=TRUE)

(ii)  Use par(mfrow) instead of split.screen() -- its much more reliable.
For example,

par(mfrow=c(2,1))
par(mar=c(10, 5, 4, 2))
x <- 1:10
plot(x)
box("figure", lty="dashed")
par(mar=c(5, 5, 10, 2))
plot(x)
box("figure", lty="dashed")

(iii)  Stick an empty plot between the plots.  For example,
(NOTE if you are using R version > 1.2.1 then this might not work;  please
do NOT report this bug - it has been fixed for the upcoming 1.3 release
already)

par(mfrow=c(3,1), mar=c(5.1, 4.1, 4.1, 2.1))
plot(x)
box("figure", lty="dashed")
plot.new()
plot(x)
box("figure", lty="dashed")

(iv)  Control the space between the plots more accurately with a layout.
For example,

layout(matrix(c(1, 0, 2), ncol=1),
       heights=c(1, lcm(5), 1))
plot(x)
box("figure", lty="dashed")
plot(x)
box("figure", lty="dashed")


Hope that helps

Paul


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