From: Deepayan Sarkar <deepayan.sarkar_at_gmail.com>

Date: Sat 03 Dec 2005 - 10:54:45 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Dec 03 11:01:21 2005

Date: Sat 03 Dec 2005 - 10:54:45 EST

On 12/2/05, Michelle DePrenger-Levin <DePrengM@botanicgardens.org> wrote:

> Hello,

*>
**> I am creating a 3D scatter plot with the cloud function. I ask it to
**> group my rows by a "Treatment" column (there are 4 different groups). I
**> need to know which points in the plot correspond to which rows (which
**> treatment). By default it assigns pchs and cols to each group. When I
**> try to define the colors or point shapes it seems to use the first color
**> and pch for both the first and last group. I've tried to add:
**>
**> col = c("blue","red","orange","green"),
**> pch = c(20,20,22,22),
**>
**> after the "cex" line.
*

It's difficult to say without a reproducible example. The following works as expected for me:

g <- gl(4, 50)

mu <- 2 * as.numeric(g)

x <- rnorm(200, mean = mu) y <- rnorm(200, mean = mu) z <- rnorm(200, mean = mu) cloud(z ~ x * y, groups = g, col = c("blue", "red", "orange", "green"), pch = c(20, 20, 22, 22))

The only explanation I can think of is that your grouping variable has more than 4 levels. What does

table(RMM$Treatment)

give you? Although, that doesn't explain why cex would work.

-Deepayan

> The only think that seems to work and keep all four groups separate is

*> making
**>
**> cex = c(1,2,3,4),
**>
**> I cannot figure out what it combines the first and last of my groups
**> with the same point character and color. Any suggestions?
**>
**> (Part of my code)
**> ....
**> print(cloud(RMMdistMETAc3$points[,1] ~ RMMdistMETAc3$points[,2] *
**> RMMdistMETAc3$points[,3],
**> data = RMM,
**> cex = 0.8,
**>
**> groups = Treatment,
**> screen = list(z = 10, x = -40, y = 3),
**> ) .....
*

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Dec 03 11:01:21 2005

*
This archive was generated by hypermail 2.1.8
: Sat 03 Dec 2005 - 14:28:14 EST
*