Sundar -
Thanks for the help! Here is my modified code. Just what I wanted.
However, it is odd that the at= call in contourplot won't take a
single value - I have had to trick it into plotting the "0" contour
along with the 0.5 to make this work.
contourplot(preds~size+trt|Size.Name,
data=pred.dat,layout=c(2,4),
par.strip.text=list(cex=1.2),
scales=list(cex=0.5),
xlab=list("Size",cex=1.2),
ylab=list("Treatment",cex=1.2),
panel=function(at,lty,...){
at.1<-c(0,0.5)
at.2<-c(0.025,0.975)
panel.contourplot(at=at.1,lty=1,...)
panel.contourplot(at=at.2,lty=2,...)
panel.grid(h=-1,v=-1,col="grey",...)})
Andrew
On 22 Feb 2009, at 21:25, Sundar Dorai-Raj wrote:
The only way I can figure out to do this is to use two calls to
panel.contourplot:
library(lattice)
x <- seq(-2, 2, length = 20)
y <- seq(-2, 2, length = 20)
grid <- expand.grid(x=x, y=y)
grid$z <- dnorm(grid$x) * dnorm(grid$y)
contourplot(z ~ x * y, grid,
panel = function(at, lty, col, ...) {
at.o <- at[seq(1, length(at), 2)]
at.e <- at[seq(2, length(at), 2)]
panel.contourplot(at = at.o, lty = 1, col = "blue", ...)
panel.contourplot(at = at.e, lty = 4, col = "red", ...)
},
at = pretty(grid$z, 10))
HTH,
--sundar
On Sun, Feb 22, 2009 at 12:45 PM, Andrew Beckerman
<a.becker...@sheffield.ac.uk> wrote:
Dear all -
I would like to adjust the line type of specific contours in
contourplot
from the lattice package, but it seems like lty does not take a
list in the
call.
Here is my call to contourplot:
contourplot(preds~size+trt|Size.Name,
data=pred.dat,layout=c(2,4),
at=c(0.025,0.5,0.975),
par.strip.text=list(cex=1.2),
scales=list(cex=0.5),
xlab=list("Size",cex=1.2),
ylab=list("Treatment",cex=1.2),
panel=function(x,y,z,...){
panel.contourplot(x,y,z,lwd=1,...)
panel.grid(h=-1,v=-1,col="grey",...)})
I would like to specify lty=c(2,1,2) corresponding to the
at=c(0.025,0.5,0.975), and have tried this in both the core part of
the
call, and in panel.countourplot. However, it only recognises the
first
type.
If there is no straightforward answer, I can provide the data.
Best wishes,
Andrew
R version 2.8.1 (2008-12-22)
i386-apple-darwin8.11.1
locale:
en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] MASS_7.2-45 lattice_0.17-17
loaded via a namespace (and not attached):
[1] grid_2.8.1
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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++++++++++++++++++++++++++++++++++++
Dr. Andrew Beckerman
Department of Animal and Plant Sciences
University of Sheffield
Sheffield S10 2TN
UK
a.becker...@sheffield.ac.uk
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and provide commented, minimal, self-contained, reproducible code.
