[R] [R-pkgs] New package: relations

David Meyer david.meyer at wu-wien.ac.at
Tue Jun 5 00:11:32 CEST 2007


Dear useRs,

it is our great pleasure to announce the new package "relations" to
appear on all CRAN-mirrors soon.

This package provides data structures and methods for creating and
manipulating relations, relation ensembles, sets, and tuples. The
feature list includes:

* creation of relations by domain and graph/characteristic
function/incidences,

* extraction of characteristic function and graph,

* predicate functions for the most common standard characteristics,

* operators known from relational algebra theory (such as projection,
selection, cartesian product, joins, etc.),

* transitive/reflexive reduction and closure of a relation,

* relation ensembles for combining relations,

* fitters for determining (possibly all) consensus relations of a
relation ensemble including the Borda and Condorcet methods, as well as
exact solvers for minimizing a criterion function based on the symmetric
difference (Kemeny-Snell) metric.

* a simple plot method for Hasse-diagrams using RGraphviz.


Kurt and David

_______________________________________________
R-packages mailing list
R-packages at stat.math.ethz.ch
https://stat.ethz.ch/mailman/listinfo/r-packages



More information about the R-help mailing list