I want to label groups of points in
the plot of residuals against predicted values
generated by plot.lm().
Labelling the points by color
x<-1:15
y<-rnorm(15)
f<-factor(rep(c(1:3),each=5))
g<-glm(y~x)
plot(g,which=1,col=c(1,2,3)[f])
I receive the error message
Error in title(main, sub, xlab, ylab, line, outer, ...) :
graphical parameter "col" has the wrong length
How can I resolve the error?
Labelling by symbols works fine
plot(g,which=1,pch=c(1,2,3)[f])
And setting
par(mfrow=c(1,2))
before plotting, produces the color plot without error
plot(g,which=1,col=c(1,2,3)[f])
Ulrich
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 3.0
year 2006
month 04
day 24
svn rev 37909
language R
version.string Version 2.3.0 (2006-04-24)
Ulrich Halekoh
Danish Institute of Agricultural Sciences
Unit of Statistics and Decision Analysis
8830 Tjele, Denmark
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