diana.object {cluster} | R Documentation |
The objects of class "diana"
represent a divisive hierarchical clustering of a dataset.
A legitimate diana
object is a list with the following components:
order |
a vector giving a permutation of the original observations to allow for plotting, in the sense that the branches of a clustering tree will not cross. |
order.lab |
a vector similar to order , but containing observation labels instead of
observation numbers. This component is only available if the original
observations were labelled.
|
height |
a vector with the diameters of the clusters prior to splitting. |
dc |
the divisive coefficient, measuring the clustering structure of the dataset.
For each observation i, denote by d(i) the diameter of the last cluster to
which it belongs (before being split off as a single observation),
divided by the diameter of the whole dataset.
The dc is the average of all 1 - d(i). It can also be seen as the average
width (or the percentage filled) of the banner plot.
Because dc grows with the number of observations, this measure should not
be used to compare datasets of very different sizes.
|
merge |
an (n-1) by 2 matrix, where n is the number of
observations. Row i of merge describes the split at step n-i of
the clustering. If a number j in row r is negative, then the single
observation |j| is split off at stage n-r. If j is positive, then the
cluster that will be splitted at stage n-j (described by row j), is
split off at stage n-r.
|
diss |
an object of class "dissimilarity" , representing the total
dissimilarity matrix of the dataset.
|
data |
a matrix containing the original or standardized measurements, depending
on the stand option of the function agnes . If a dissimilarity matrix was
given as input structure, then this component is not available.
|
This class of objects is returned from diana
.
The "diana"
class has methods for the following generic functions:
print
, summary
, plot
.
The class "diana"
inherits from "twins"
.
Therefore, the generic function pltree
can be used on a
diana
object.