• partykit now depends on R version >= 3.1.0 in order to import the depth() generic from the grid package.
• The print methods for party/partynode objects with only a root node was modified. Now, the terminal panel function is also applied if there is only a root node (while previously it was not).
• ctree() now catches sum(weights) <= 1 situations before they lead to an error.
• Code from suggested packages is included by using :: syntax as required by recent R versions.
• Argument ytrafo of ctree() can now be a function which will be updated in every node.
• A small demo briefly illustrating some memory and speed properties has been added. It can be run interactively via demo("memory-speed", package = "partykit").
• Section 3 of the "constparty" vignette now shows how properties of a new tree algorithm can be assessed by using partykit building blocks.