[R--gR] CoCo 1.6.1

[Jens Henrik Badsberg]

 Dear gR,

 A new version, 1.6.1, of the CoCo bundle with CoCoCg is now available from
 www.jbs.agrsci.dk/Biometry/Software-Datasets/CoCo/CoCo.1.6 and from
 http://www.math.auc.dk/gr/material/CoCo/ .

 For windows users: Remember to have cygwin1.dll somewhere in your path,
 (e.g. in .../rw1090/bin if you do not have it in a more permanent place).


 The CoCoCg package is now "more useful":

 - CoCoCg and MIM produces the exact (to four digits after the decimal point)
   same deviance (and DF) of all the 760 MIM-models on the Rats-data
   (see table 4.4 of Introduction to Graphical Modelling, David Edwards,
    or data(Rats) after library(CoCoCg) ).

 - All the 1101 hierarchical interaction models (as defined in section 6.4
   of Graphical Models, Lauritzen 1996) on Rats can be fitted by CoCoCg,
   and 2 times 1101 tests all gives positive difference between deviances.

   [ The two above: An other convergence criterion (difference between observed
     and expected sufficient statistics) and full line search is now implemented,
     and fix of updating single quadratic generators in CoCoCg. ]

 - The degrees of freedom is also computed correct when specifying the
   quadratic generators independent of the quadratic pair generators by the
   "^" as in e.g. enterModel("[[ab]] / [[aby][abx]] / [[y^][abxy][x^]];")

   [ Fix of term for intersection of quadratic generators in computing DF. ]


 A package called CoCoGraph is now made by taking a part out of CoCoObject -
 
 a) to be able to load CoCo and CoCoCg without dynamicGraph (loading dynamic-
    graph does take some time with the current versions of R and dynamicGraph),

 b) to highlight the interface to dynmaicGraph.


 The four functions propertySet, propertyModel, returnVertexOrder and
 returnJunctionTree can now be used without "data" in a more flexible
 form, as, e.g.

   str(returnJunctionTree(model = "IJ,IZ,ZY", continuous = "YZ"))

 for the junction tree of graph 6.1 (c), page 176 in Lauritzen 1996.


 Regards,

 Jens Henrik Badsberg