plot Method for tclust Objects
Description
The plot
method for classes tclust
and tkmeans
.
Usage
1 2 3 4 
Arguments
x 
The 
... 
Further (optional) arguments which specify the details of the resulting plot (see section "Further Arguments"). 
Details
One and two dimensional structures are treated separately
(e.g. tolerance intervals/ellipses are displayed).
Higher dimensional structures are displayed by plotting the two first Fisher's
canonical coordinates (evaluated by discr_coords
)
and derived from the final cluster assignments (trimmed observations are not
taken into account). plot.tclust.Nd
can be called with one or
twodimensional tclust
objects too.
The function fails, if "store.x = FALSE
" is specified in
tclust
, because the original data matrix is required
here.
Further Arguments
xlab, ylab, xlim, ylim, pch, col

Arguments passed to
plot
. main

The title of the plot. Use "/p" for displaying the chosen parameters
alpha
andk
or "/r" for plotting the chosen restriction (tclust
only). main.pre

An optional string which is added to the plot's caption.
sub

A string specifying the subtitle of the plot. Use "/p" (default) for displaying the chosen parameters
alpha
andk
, "/r" for plotting the chosen restriction (tclust
only) and "/pr" for both. sub1

A secondary (optional) subtitle.
labels

A string specifying the type of labels to be drawn. Either
"none"
(default),"cluster"
or"observation"
can be specified. If specified, parameterpch
is ignored. text

A vector of length
n
(the number of observations) containing strings which are used as labels for each observation. If specified, the parameterslabels
andpch
are ignored. by.cluster

Logical value indicating whether parameters
pch
andcol
refer to observations (FALSE
) or clusters (TRUE
). jitter.y

Logical value, specifying whether the drawn values shall be jittered in ydirection for better visibility of structures in 1 dimensional data.
tol

The tolerance interval. 95% tolerance ellipsoids (assuming normality) are plotted by default (
tclust
only). tol.col, tol.lty, tol.lwd

Vectors of length
k
or1
containing thecol
,lty
andlwd
arguments for the tolerance ellipses/lines (tclust
only).
Author(s)
Agustin Mayo Iscar, Luis Angel Garcia Escudero, Heinrich Fritz
Examples
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23  # EXAMPLE 1
sig < diag (2)
cen < rep (1, 2)
x < rbind (
rmvnorm (360, cen * 0, sig),
rmvnorm (540, cen * 5, sig * 6  2),
rmvnorm (100, cen * 2.5, sig * 50)
)
# Two groups and 10% trimming level
a < tclust (x, k = 2, alpha = 0.1, restr.fact = 12)
plot (a)
plot (a, labels = "observation")
plot (a, labels = "cluster")
plot (a, by.cluster = TRUE)
# EXAMPLE 2
x < c( rnorm(72, 0, 1),
rnorm(108, 10, 1),
rnorm(20, 2.5, 10))
a < tkmeans (x, k = 2, alpha = 0.1)
plot (a, jitter.y = TRUE)
