Thanks for your example as well. Ted's example was exactly what I needed.
On Aug 19, 2010, at 3:18 PM, Gavin Simpson wrote:
On Thu, 2010-08-19 at 14:28 -0700, r.ookie wrote:
> Well, I had to look further into the documentation to see 'If asp is a
> finite positive value then the window is set up so that one data unit
> in the x direction is equal in length to asp * one data unit in the y
> direction'
>
> Okay, so in what situations is the 'asp' helpful?
If 'x' and 'y' are in the same units but one covers a larger/smaller
range than the other, asp will make the axes be scaled in the same units
such that the distance along the 'y' axis for 1 unit change is the same
as the distance along the 'x' axis for a 1 unit change.
dat <- data.frame(x = seq(1, 100, length = 100),
y = seq(1, 10, length = 100))
layout(matrix(1:2, ncol = 2))
plot(y ~ x, data = dat)
plot(y ~ x, data = dat, asp = 1, main = expression(asp == 1))
layout(1)
If x and y are both in say metres the second plot respects the natural
scale whereas the first doesn't.
G
>
> On Aug 19, 2010, at 2:24 PM, David Winsemius wrote:
>
>
> On Aug 19, 2010, at 5:13 PM, r.ookie wrote:
>
>> set.seed(1)
>> x <- rnorm(n = 1000, mean = 0, sd = 1)
>> plot(x = x, asp = 2000)
>>
>> Could someone please explain what the 'asp' parameter is doing?
>
> You want us to read the help page to you?
>
--
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
Dr. Gavin Simpson [t] +44 (0)20 7679 0522
ECRC, UCL Geography, [f] +44 (0)20 7679 0565
Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk
Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/
UK. WC1E 6BT. [w] http://www.freshwaters.org.uk
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
