I am using hclust and plot to produce dendrograms. Using my input data I am
able to complete an analysis and obtain a vertical plot.
I want to be able to plot the dendrogram horizontally.I am using version 2.6
of R and have updated my packages recently.
 
Using the sample script for dendrograms I can produce a horizontal plot
using the instruction horiz = TRUE in plot().
When I use the same instruction in my own script I get a warning message
that horiz, and horizontal, are not recognized commands in plot.
I cannot find any documentation in R on how to change the orientation of
plots and general searches for information on this subject.
Can someone explain why my script does not work.
 
Sample code follows:
-----------------------------------------------------------------------
# Sample code extracted from the Dendrogram documentation in R
#
require(graphics); require(utils)
 
hc <- hclust(dist(USArrests), "ave")
(dend1 <- as.dendrogram(hc)) # "print()" method
str(dend1)          # "str()" method
str(dend1, max = 2) # only the first two sub-levels
 
op <- par(mfrow= c(2,2), mar = c(5,2,1,4))
plot(dend1, horiz = TRUE)
plot(dend1)
#
# My code
#
x <- read.table("Rclust2.data",header=TRUE)
 
m <- data.matrix(x)
d <- as.dist(m)
h <- hclust(d)
plot(h, horiz = TRUE)

----------------------------------------------------------------------
The three plot commands execute. Plot 1 is horizontal, plot 2 is vertical
and plot 3 is vertical. Plus plot 3
generates the console output:
-----------------------------------------------------------------
> #
> # My code
> #
> x <- read.table("Rclust2.data",header=TRUE)
> 
> m <- data.matrix(x)
> d <- as.dist(m)
> h <- hclust(d)
> plot(h, horiz = TRUE)
Warning messages:
1: In plot.hclust(h, horiz = TRUE) : "horiz" is not a graphical parameter
2: In plot.hclust(h, horiz = TRUE) : "horiz" is not a graphical parameter
3: In title(main = main, sub = sub, xlab = xlab, ylab = ylab, ...) :
  "horiz" is not a graphical parameter
---------------------------------------------------------------
 
I would appreciate help solving this problem. Doubtless there is a simple
answer.

 

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