version 0.1-8 (Feb.2011):
first public release and distribution via WWW
version 0.1-9 (2011-03-31)
- included a function to compute the adjusted Rand index of two partitions
- included the density-based Silhouette plot as possible option when
displaying objects of class pdfCluster
version 0.1-10 (2011-06-10)
- fixed a bug in pdfClassification
- included the possibility to match argument in choosing a method for plotting
objects of class kepdf
- changed the default colors to be used when plotting objects of class
pdfSilhouette
- added the Call of the function in the Show-methods for function pdfCluster
- fixed a bug in function dbs, occurring when some posterior probabilities
are numerically estimated as zero
version 0.1-11 (2011-06-16)
- fixed a bug in the procedure for finding high-density connected regions,
occurring when groups are so well separated that more than one connected
region are founded for any of the n.grid thresholds of the density estimate
- included a message to be printed when classification of low-density data
points is accomplished in less than n.stage stages.
version 0.1-12 (2011-06-27)
- found a bug in function "quantile". Given a vector of ordered probabilities,
it may return unsorted quantiles (at the 16th digit). Fixed by rounding to the
15th digit the values of function "quantile".
- some minor changes in documentation.
version 0.1-13 (2011-06-29)
- extended the class "dendrogram" to the slot "tree" of objects of class
pdfCluster, also when 1 cluster only is found. As a consequence,
plotting the cluster tree is now possible even in this case
- removed the slot "ctrl" from objects of class pdfCluster
- included the slot "noc" in objects of class pdfCluster
- included a control in pdfClassification: outliers with zero estimated
conditional density of belonging to the detected groups are now excluded from
the classification
version 1.0-0 (2012-04-20)
Warning: major modifications of the pdfCluster package.
Old codes might not work or produce different results!
- new option which implements adaptive kernel density estimation;
- new function hprop2f to automatically select the matrix of badwidths
according to Silverman's(1986) approach;
- new arguments "bwtype", "hx", "alpha" in function kepdf;
- new kernel function "t7" to save time in computation for very
large datasets;
- new arghument "kernel" in function "kepdf";
- removed argument "h.weigths" in function "kepdf";
- new slots "kernel", "bwtype" and "par" in objects of class "kepdf";
- removed slots "h" and "h.weigths" in objects of class "kepdf";
- new argument "indcol" in function "plot.kepdfdd";
- new procedure to find connected components; to be used instead
of the Delaunay triangulation for high-dimensional data;
- new arguments in function "pdfCluster": "graphtype", "Q", "lambda",
"grid.pairs";
- arguments in function pdfCluster left as optional only: "h", "n.stage";
- new slots in objects of class pdfCluster: "pdf", "graph";
- new arguments "cores" and "se" in function "pdfClassification";
- new "pdfCluster" methods for objects of class "numeric", "matrix",
"data.frame", "pdfCluster";
- removed argument "h.funct" in pdfClassification;
- classes "pdf.Silhouette" and "pdf.Silhouette.summary" renamed as "dbs" and
"dbs.summary" respectively;
- renamed slot "nc" to "noc" in dbs-class objects
version 1.0-1 (2013-07-28)
- new default value for argument "n.grid" of function "pdfCluster", set to an
increasing function of the sample size
- added a warning message when "pdfCluster" is run with data of dimension > 6
and graphtype="delaunay"
- added a warning message when "pdfCluster" is run with discrete data
- some typos corrected in the help files and in "show" method of objects of class
"kepdf"
- changed message to be displayed when "n.grid" is set to a too small value
- added specific argument "hmult" of function "pdfCluster" (previously optional)
- signatures of "pdfCluster" methods modified
- included option to break running of foreign .C function to find pairwise connections
- added new function "groups" to extract groups; slot "clusters" in objects
of pdfCluster-class is now to be considered obsolete