Message-ID: <4265347E.1060205@lancaster.ac.uk>
Date: 2005-04-19T16:40:30Z
From: Barry Rowlingson
Subject: Aspect ratio and limits
In-Reply-To: <1113927448.939.19.camel@horizons.localdomain>
Marc Schwartz wrote:
> # Set height value as you require
> height <- 3
> X11(width = aspect * height, height = height)
> ....
> Does that get you what you need?
I'm guessing that will work, but it just seems unsatisfactory, since
if I resize my graphics window I mess it up.
If I set par(pty='s') I can have a square plot floating inside a
graphics window of any shape, I'd like to be able to plot something
specifying ylim and asp and get a rectangular plot with a fixed aspect
ratio floating around inside a resizable graphics device....
The 'aspect' ratio of xyplot (lattice package) lets you specify the
aspect ratio of the plot (not relating to the data, ie aspect=1 draws a
square plot whatever the ratio of X and Y range). Try this:
xy=data.frame(x=c(0,21),y=c(0,4))
xyplot(y~x,data=xy,aspect=0.2)
- now resize the graphics window and the plot keeps its ratio. That's
the effect I was hoping to get from base graphics.
I could use lattice graphics but I'd have to work out the value of
'aspect' to get the 1:1 aspect ratio for my data. I'm not sure this is
trivial, since it may involve considering the various margins and
spacing around a plot.
Close...
Baz