NEWS in package ‘cluster’

Changes in version 2.1.4 (2022-08-19)

New Features

New medoids() to compute pam-consistent medoids, given a clustering (and data).

Bug Fixes

help(dissimilarity.object) now correctly describes the meaning of a method = "gower" result type "T". Also, help(daisy) now extensively documents the different options for type = *, notably "ordratio" and "logratio".
pam(x, diss=TRUE) uses inherits(x, "dissimilarity") instead of semi-deprecated data.class(x) == "dissimilarity") to check.
Using deparse1() from R version 4.0.0 and newer (even when cluster is installed into an older versions of R), e.g., in plot default titles.

Changes in version 2.1.3 (2022-03-28)

New Features

as.data.frame(<silhouette>) now works; suggested by Jonathan Marshall (@Massey, NZ).

Translations

Updated German translations (Detlef Steuer)

Tweaks

use explicit cast, quieting -Wconversion.

Changes in version 2.1.2 (2021-04-16)

New Features

Updated the Italian translations (by Daniele Medri), the French (by Philippe Grosjean) and the German (by Detlef Steuer). New Lithuanian translations by Gabriele Stupuriene & Rimantas Zakauskas.

Changes in version 2.1.1 (2021-02-11)

New Features

Added Italian translations from Daniele Medri, and updated the French ones from Philippe Grosjean.
clara() gains a cluster.only argument, entirely “in parallel” to pam().
the silhouette() method for clara now allows full to be a number in [0,1] instead of just a logical and it gains gains new optional argument subset to specify the indices of observations for which silhouette values shold be computed.
Faster pam() - ‘fasterPAM’ from Erich Schubert. New optional arguments medoids = "random", nstart, and variant, notably variant = "faster".

Changes in version 2.1.0 (2019-06-07)

Bug Fixes

volume(obj) is now correct also for ellipsoids of dimension d > 2.
--enable-lto compilation revealed missing weights argument in ‘src/cluster.h’'s declaration of cldaisy().

Tweaks

Replaced many “old style” ⁠`<word>'⁠ quotations.

Changes in version 2.0.9 (2019-05-01)

Tweaks

‘src/mona.c’ now uses correct void F77_NAME and source cleaned.

Changes in version 2.0.8 (2019-04-02)

New Features

pam() gets new pamonce options, for values 3, 4, or 5, choosing versions of fastpam, contributed by Erich Schubert, Univ. Dortmund.
update ‘tests/*’ to work with R >= 3.6.0 (sample.kind)

Bug Fixes

correct thinko in ?clusGap, the help page.

Changes in version 2.0.7 (2018-03-29)

New Features

clara() gets new option metric = "jaccard", contributed by Kamil Kozlowski and Kamil Jadszko.
pam() and clara() use match.arg(metric) and hence metric can be abbreviated (and invalid strings give an error instead of being interpreted as "euclidean").

Bug Fixes

The bug fix of clara(*, correct.d = TRUE) (from version 2.0.4) for the NA-data case now also applies to the internal C function selec().

Changes in version 2.0.6 (2017-03-10)

New Features

mona() now C- instead of Fortran-based (having used f2c etc) and now has a trace.lev option which allows progress reporting “remembers” if the original data had missing values.

Bug Fixes

mona(<1-column>) no longer loops infinitely but signals an error.

Changes in version 2.0.5 (2016-10-07)

New Features

clusGap() gets a new option scaleH0, and scaleH0 = "original" is an alternative to the default PCA rotation.
clusGap() now also stores its call and uses that for print()ing and (by default in the main title) for plot()ing "clusGap" objects.
__ MOSTLY NOT IMPLEMENTED yet __

diana() gets new optional argument stop.at.k. When a positive integer, the DIANA algorithm will stop early, as much desirable for large n.

Bug Fixes

daisy() gets 3+1 new options warn* which allow to suppress three different kind of warnings, as these are undesirable in some cases. With thanks to Kirill Müller for the convincing context.
pam() now signals an error when there are more than 65536 observational units (whereas it could segfault previously), thanks to a patch from Mikko Korpela, Helsinki.

Changes in version 2.0.4 (2016-04-16)

New Features

clusGap() gets a new option d.power = 1 allowing to choose the basic weight statistic as it was originally proposed, namely squared distances by setting d.power = 2.

Bug Fixes

fix small glitch in silhouette's help page.
Finally fixed a bug (in the original Fortran code from Rousseeuw!) in clara's distance computation when there are NAs in the data. As the fix is not backward compatible, a warning is produced (for the time being) if there are NAs and the user does not explicitly use clara(*, correct.d = TRUE).

Changes in version 2.0.3 (2015-07-20)

New Features

This new ‘NEWS.Rd’ file – going to replace ‘ChangeLog’ eventually.

Bug Fixes

import all we need (but not more) from the "base" pkgs (stats, graphics, ...).

Changes in version 2.0.2 (2015-06-18)

New Features

using new anyNA() where appropriate.
New Korean translations, thanks to Chel Hee Lee.
plotpart(): cmdscale() tweaks.

Bug Fixes

valgrind detected missing allocation (nisol["1"] for k=1).
typo R/daisy.q (R bug PR#16430).

Changes in version 2.0.1 (2015-01-31)

Bug Fixes

Fix silhouette( obj ) for obj <- pam(x, k = 1).

Changes in version 2.0.0 (2015-01-29)

New Features

pam() now using .Call() instead of .C() is potentially considerably more efficient.
agnes() has improved trace behaviour; also, some invalid par.method = * settings now give an early and understandable error message.
lower.to.upper.tri.inds() (etc) now returns integer.

Bug Fixes

.C(..) and .Fortran(..): no longer using DUP=FALSE as that has become deprecated.

Changes in version 1.15.3 (2014-09-04)

New Features

agnes() and diana() finally get, respectively work with a trace.lev option.
plot.(agnes|diana)() now deals well with long calls, by using multiple title lines.
Message translations now also for C level error messages.

Bug Fixes

agnes(*, method="flexible", par.method = c(a1, a2, b, c)), i.e., length(alpha) == 4, finally works correctly.

Changes in version 1.15.2 (2014-03-31)

New Features

Rewrote parts of the R level messages so they are more easily translatable, thanks to proposals by Lukasz Daniel.
French translations from Philippe Grosjean.

Changes in version 1.15.1 (2014-03-13)

Bug Fixes

mona example not working in R < 3.0.x.

Changes in version 1.15.0 (2014-03-11)

New Features

agnes(*, method = "gaverage") contributed by Pierre Roudier.
documentation improvements;
better translatable messages and translation updates.

Changes in version 1.14.4 (2013-03-26)

New Features

Bug Fixes

Changes in version 1.14.3 (2012-10-14)

New Features

Polnish translations from Lukasz Daniel.

Bug Fixes

Changes in version 1.14.2 (2012-02-06)

New Features

New clusGap() to compute the “cluster Gap” goodness-of-fit statistic.

Bug Fixes

Changes in version 1.14.1 (2011-10-16)

New Features

First translations (into German, thanks to Detlef Steuer).
better citation("cluster")

Bug Fixes

plot.silhouette(..., col = <one per cluster>) had ordering bug.

Changes in version 1.2-1

Versions 1.2-1, ... 1.13-3

60 more CRAN releases of the package cluster from Dec 1999 to Feb 2011, see also the ‘ChangeLog’ file and svn log.

Changes in version 1.2-0 (1999-04-11)

First CRAN release of the 'cluster' package, by Kurt Hornik

Martin Maechler had its own version independently.
Both closely modeled after clus the tarball off JSS.

R Functions - Fortran Files

agnes() – ‘twins.f’ for the “twins” agnes and diana.
clara() – clara.f
daisy() – ‘daisy.f’ (and ‘meet.f’)
diana() – (twins.f)
fanny() – ‘fanny.f’
mona() – ‘mona.f’
pam() – ‘pam.f’

Data Sets

agriculture
animals
flower
ruspini
votes.repub

Further Features

all Examples in ‘man/*.Rd’ hand edited to become executable.
summary(), print() (and print.summary.**() methods) for the six basic R functions above.

Changes in version 1.1-2 (1998-06-16)

Renamed previous 'clus' to 'cluster'

Changes in version 1.1-1 (1998-06-15)

New Features

started ‘ChangeLog’