Dear all,
I would like to draw a dendrogram and mark some parts/branches (by using
"segments") including their labels. If I draw it without specifying the length
of x axix, I am able to do that (as in My dendrogram 1 of the following codes).
However, if I want to specify the x axix, I am not able to draw marking line
(by using "segments") including labels (as in My dendrogram 2 of the following
codes). Is there a way that I can include my labels into as well? Any help is
deeply appreciated.
Kind Regards
Seyit Ali
Codes:
set.seed(201)
x<-matrix(rnorm(100, 0, 1), ncol=20, byrow=TRUE)
myclust<- hclust(dist(cor(x), method='euclidian'), method="ave")
mydend<-as.dendrogram(myclust)
par(mfrow=c(1,2), mar=c(5,4,4,3), oma=c(1, 3, 1, 3))
plot(mydend, xlim=c(4, -0.2), horiz = TRUE, main="My Dendrogram 1")
x0<- -0.35
y0<- 0.5
x1<- 1.8
y1<- 0.5
segments(x0, y0, x1, y1, col="red", lty=2)
x0<- -0.35
y0<- 4.4
x1<- 1.8
y1<- 4.4
segments(x0, y0, x1, y1, col="red", lty=2)
x0<- -0.35
y0<- 0.5
x1<- -0.35
y1<- 4.4
segments(x0, y0, x1, y1, col="red", lty=2)
x0<- 1.8
y0<- 0.5
x1<- 1.8
y1<- 4.4
segments(x0, y0, x1, y1, col="red", lty=2)
################################################################################
plot(mydend, xlim=c(4, 0.5), horiz = TRUE, main="My Dendrogram 2",
dLeaf=0.35)#, yaxt="n")
x0<- 0.3
y0<- 0.5
x1<- 1.8
y1<- 0.5
segments(x0, y0, x1, y1, col="red", lty=2)
x0<- 0.3
y0<- 4.4
x1<- 1.8
y1<- 4.4
segments(x0, y0, x1, y1, col="red", lty=2)
x0<- 0.3
y0<- 0.5
x1<- 0.3
y1<- 4.4
segments(x0, y0, x1, y1, col="red", lty=2)
x0<- 1.8
y0<- 0.5
x1<- 1.8
y1<- 4.4
segments(x0, y0, x1, y1, col="red", lty=2)
------------------------------------------------------------------------------------------------------------------
Dr. Seyit Ali KAYIS
Selcuk University
Faculty of Agriculture
Kampus, Konya, TURKEY
s_a_ka...@yahoo.com, s_a_ka...@hotmail.com
Tell: +90 332 223 2830 Mobile: +90 535 587 1139 Fax: +90 332 241 0108
Greetings from Konya, TURKEY
http://www.ziraat.selcuk.edu.tr/skayis/
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