Usage
diana(x, diss = inherits(x, "dist"), metric = "euclidean", stand = FALSE, stop.at.k = FALSE, keep.diss = n < 100, keep.data = !diss, trace.lev = 0)
Arguments
x
data matrix or data frame, or dissimilarity matrix or object,
depending on the value of the diss
argument. In case of a matrix or data frame, each row corresponds to an observation,
and each column corresponds to a variable. All variables must be numeric.
Missing values (NA
s) are allowed.
In case of a dissimilarity matrix, x
is typically the output
of daisy
or dist
. Also a vector of
length n*(n-1)/2 is allowed (where n is the number of observations),
and will be interpreted in the same way as the output of the
above-mentioned functions. Missing values (NAs) are not allowed.
diss
logical flag: if TRUE (default for dist
or
dissimilarity
objects), then x
will be considered as a
dissimilarity matrix. If FALSE, then x
will be considered as
a matrix of observations by variables.
metric
character string specifying the metric to be used for calculating
dissimilarities between observations.
The currently available options are "euclidean" and
"manhattan". Euclidean distances are root sum-of-squares of
differences, and manhattan distances are the sum of absolute
differences. If x
is already a dissimilarity matrix, then
this argument will be ignored.
stand
logical; if true, the measurements in x
are
standardized before calculating the dissimilarities. Measurements
are standardized for each variable (column), by subtracting the
variable's mean value and dividing by the variable's mean absolute
deviation. If x
is already a dissimilarity matrix, then this
argument will be ignored.
stop.at.k
logical or integer, FALSE
by default.
Otherwise must be integer, say $k$, in $\{1,2,..,n\}$,
specifying that the diana
algorithm should stop early.
Non-default NOT YET IMPLEMENTED.
keep.diss, keep.data
logicals indicating if the dissimilarities
and/or input data x
should be kept in the result. Setting
these to FALSE
can give much smaller results and hence even save
memory allocation time.
trace.lev
integer specifying a trace level for printing
diagnostics during the algorithm. Default 0
does not print
anything; higher values print increasingly more.