- The support for (generalized) linear model trees with just a
constant regressor has been improved. Now lmtree(y ~ x1 + x2) is
short for lmtree(y ~ 1 | x1 + x2), analogously for glmtree().
Plotting now also works properly in this case.
- The as.party() method for "rpart" objects did not work if one of the
partitioning variables was a "character" variable rather than a
"factor". A suitable work-around has been added.
- The node_barplot() panel function can now also be used for
multivariate responses, e.g., when all responses are numeric and on
the same scale.
- The package now also includes a new data set HuntingSpiders which is
essentially a copy of the spider data from the package mvpart that
is currently archived on CRAN. The documentation has been improved
somewhat and is likely to change further to explain how the data
has been transformed in De'ath (2002).
- The survival tree example for the GBSG2 data was broken due to the
response being (incorrectly) also part of the explanatory
variables. Fixed by using the latest Formula package (at least
version 1.2-1).