From: Charilaos Skiadas <cskiadas_at_gmail.com>

Date: Tue, 27 May 2008 06:14:33 -0400

})

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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. Received on Tue 27 May 2008 - 10:45:33 GMT

Date: Tue, 27 May 2008 06:14:33 -0400

On May 27, 2008, at 3:10 AM, Hofert Marius wrote:

*> Hi,
**>
*

> Consider the following cloud()-plot consisting of two lines:

*>
**> library(lattice)
**> mydata=data.frame(x=rep(1:4,2),y=rep(1:2,each=4),z=c(1,2,3,4,4,3,2,1))
**> cloud(z~x*y,data=mydata,groups=y,type=rep("l",2))
**>
**> Now, I would like to change the color of the lines (still works fine):
**>
**> cloud(z~x*y,data=mydata,groups=y,type=rep("l",2),col=c(1,2))
**>
**> But when I change the color to be the same for each group, i.e. for
**> both lines, then the groups are "combined" by a line:
**>
**> cloud(z~x*y,data=mydata,groups=y,type=rep("l",2),col=c(2,2))
**>
**> How do I remove this group-combining line so that the cloud()-plot
**> looks like in the first plot above, but with the same colors for
**> each line? Assigning the color in the data.frame mydata also did
**> not help.
*

Interesting behaviour, I would consider it a bug. Try this:

cloud(z~x*y,data=mydata,groups=y,type=rep("l",2),par.settings=list (superpose.line=list(col=c(2,3))), panel=function(x,y,z, groups=groups, ...) {

for (i in unique(groups)) { sb <- groups==i panel.cloud(x[sb],y[sb],z[sb], col=trellis.par.get("superpose.line") $col[i], ... ) }

})

*> Thanks!
**>
**> marius
*

Haris Skiadas

Department of Mathematics and Computer Science
Hanover College

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