CHANGES IN party VERSION 1.0-16 (2014-08-18)

    o    import("grid")

                CHANGES IN party VERSION 1.0-15 (2014-06-26)

    o    allow for missing predictor values in new varimp for

         right-censored responses

    o    introduce varperm argument to R_get_nodeID

                CHANGES IN party VERSION 1.0-14 (2014-05-30)

    o    add experimental varimp() for right-censored responses

                CHANGES IN party VERSION 1.0-13 (2014-02-01)

    o    deal with protection issues in R-devel

                CHANGES IN party VERSION 1.0-12 (2014-01-15)

    o    mammoexp -> TH.data

                CHANGES IN party VERSION 1.0-11 (2013-12-13)

    o    deal with empty levels for teststat = "quad"

         (bug reported by Wei-Yin Loh <loh@stat.wisc.edu>)

                CHANGES IN party VERSION 1.0-10 (2013-10-24)

    o    new demo "strucchange-perm"

    o    proximity has newdata argument

                CHANGES IN party VERSION 1.0-9 (2013-09-02)

    o    export initVariableFrame (for usage in RWeka only)

    o    fix NAMESPACE problems

    o    data is in TH.data, not ipred anymore

                CHANGES IN party VERSION 1.0-8 (2013-07-11)

    o    update mvtdist

    o    documentation update

                CHANGES IN party VERSION 1.0-7 (2013-05-31)

    o    ctree and cforest ignored the scores argument for the

         response. Spotted and fixed by Silke Janitza 

         <janitza@ibe.med.uni-muenchen.de>.

                CHANGES IN party VERSION 1.0-6 (2013-01-09)

    o    use hist()$density instead of hist()$Intensities as 

         reported by R 3.0.0 to be

                CHANGES IN party VERSION 1.0-5 (2013-01-07)

    o    fix class problem reported by R 3.0.0 to be

                CHANGES IN party VERSION 1.0-4 (2012-12-18)

    o    export varimpAUC()

    o    add where() method for RandomForest class

                CHANGES IN party VERSION 1.0-3 (2012-09-26)

    o    new function varimpAUC() for AUC-based variable importance measures

    o    the `weights' argument in cforest() can now be used to define

         alternative case weights for each of the trees in the forest.

                CHANGES IN party VERSION 1.0-2 (2012-04-26)

    o    version 1.0-0 introduced a new bug in plotting Kaplan-Meier curves

         when fixing the weight problem in survfit; the x-axis labels where

         incorrect. Spotted by Sarah Vowler <Sarah.Vowler@cancer.org.uk>.

                CHANGES IN party VERSION 1.0-1 (2012-03-23)

    o    fix -Werror warnings suggested by Murray Stokely <mstokely@google.com>

    o    make sure no factor variables are evaluated as surrogate split

    o    fix confusing warning messages in varimp and check

         for non-unity weights

                CHANGES IN party VERSION 1.0-0 (2012-02-17)

    o    varimp can now partially deal with missing values

    o    Kaplan-Meier curves are now computed _after_ removing

         zero case weights (see comment in ?survfit); plots may change

         slightly.

    o    use cforest_unbiased instead of cforest_control/cforest_classical

         in examples and regression tests

                CHANGES IN party VERSION 0.9-99996 (2011-12-20)

    o    don't ship doxygen documentation with package

    o    ctree() and cforest() don't handle `-' in formulae,

         warning added to Rd files

                CHANGES IN party VERSION 0.9-99995 (2011-10-27)

    o    observations with missing values in newdata might not have gone 

         with the majority in predict(<ctree>, newdata) when no surrogate 

         split was applicable. Spotted and fixed by 

         Vik <viknesh@stat.ufl.edu>.

                CHANGES IN party VERSION 0.9-99994 (2011-08-22)

    o    reuse classes exported by coin

                CHANGES IN party VERSION 0.9-99993 (2011-07-26)

    o    attach NAMESPACE properly in tests

                CHANGES IN party VERSION 0.9-99992 (2011-05-02)

    o    fix partial matching problems

                CHANGES IN party VERSION 0.9-99991 (2010-11-19)

    o    fix tests/ dependencies

                CHANGES IN party VERSION 0.9-9999 (2010-09-13)

    o    add update slots to tree and forest objects (later to be used

         for crossvalidation)

                CHANGES IN party VERSION 0.9-9998 (2010-08-23)

    o    allow for internal permutations in predict via R_predict2

                CHANGES IN party VERSION 0.9-9997 (2010-07-06)

    o    update mvt.f (see mvtnorm)

                CHANGES IN party VERSION 0.9-9996 (2010-06-24)

    o    print progress bar while forest grows (via trace = TRUE

         in cforest_control())

                CHANGES IN party VERSION 0.9-9995 (2010-05-19)

    o    assignment of observations based on surrogate splits

         during fitting might have failed; observations went

         with majority (in a sub-optimal way)

                CHANGES IN party VERSION 0.9-9994 (2010-04-14)

    o    varimp() gives warning for non-unity weights

    o    "no admissible split found" warnings disabled

                CHANGES IN party VERSION 0.9-9993 (2010-03-04)

    o    just internals needed for mboost

                CHANGES IN party VERSION 0.9-9992 (2010-02-26)

    o    Bug fix in mob plotting for anova models

                CHANGES IN party VERSION 0.9-9991 (2010-01-27)

    o    Bug fix in error handling of mob().

                CHANGES IN party VERSION 0.9-999 (2009-09-24)

    o    minbucket was erronously interpreted as minbucket + 1

    o    p-values for teststat = "max" were wrong

         in the uncommon case of zero variances

                CHANGES IN party VERSION 0.9-998 (2009-06-17)

    o    mtry may vary with tree depth

    o    finding surrogate variables may have failed, fixed.

                CHANGES IN party VERSION 0.9-997 (2009-06-04)

    o    documentation fixes

                CHANGES IN party VERSION 0.9-996 (2009-03-27)

    o    survival fixes

                CHANGES IN party VERSION 0.9-994 (2009-02-10)

    o    fix bug in new varimp function (which was triggered

         by splits in categorical variables)

                CHANGES IN party VERSION 0.9-993 (2009-01-29)

    o    new C-level function R_remove_weights

                CHANGES IN party VERSION 0.9-992 (2009-01-19)

    o   update CITATION file

                CHANGES IN party VERSION 0.9-991 (2009-01-13)

    o   new conditional variable importance measure 

        (Strobl et al., 2008, BMC Bioinformatics) available.

                CHANGES IN party VERSION 0.9-99 (2008-10-28)

    o   a suboptimal split was implemented when the best

        split corresponded to the last row of <data> due to

        a coding error. This should have happend only very

        rarely, however, the glaucoma example is affected.

                CHANGES IN party VERSION 0.9-98 (2008-10-15)

    o   don't compute ordering of censored variables (thanks to

        Brian D. Ripley for the report)

    o   experimental version of partialPlot for cforests

    o   teststat = "quad" and testtype = "Univariate" produced

        wrong criteria in the presence of constant exploratory variables.

        Spotted by Sebastian Wietzke <Sebastian.Wietzke@axa.de>

                CHANGES IN party VERSION 0.9-97 (2008-06-26)

    o   predictions for new data containing missing values were

        wrong. Bug spotted by Wei-Yin Loh <loh@stat.wisc.edu>

    o   vignette updates

                CHANGES IN party VERSION 0.9-96 (2008-06-06)

    o   make searching for surrogate splits a little more stable

                CHANGES IN party VERSION 0.9-95 (2008-02-27)

    o   proximity() now gives _relative_ numbers 

        (similar to `randomForest'), not absolute numbers

        long-standing feature request by Henric Nilsson

                CHANGES IN party VERSION 0.9-94 (2008-01-30)

    o   documentation updates

                CHANGES IN party VERSION 0.9-93 (2007-11-30)

    o   It is now an error to ask for more surrogate variables

        than actually available. Thanks to Henric Nilsson.

                CHANGES IN party VERSION 0.9-92 (2007-11-22)

    o   predict(<ctree-object>) computed predictions

        for observations with zero weights (by passing them down the tree).

        This was already done this way by predict(<cforest-object>) but resulted

        in an error for ctree()s.

    o   minbucket added to ctree_control()

                CHANGES IN party VERSION 0.9-91 (2007-09-26)

    o   bugfix: NAs in factors lead to segfaults on 64bit machines

        as reported by Carolin Strobl <carolin.strobl@lmu.de>

    o   related to this: be more careful when splitting in

        variables containing missing values, especially factors.

    o   add examples to regression tests

    o   new function `proximity' (feature request by Henric Nilsson)

                CHANGES IN party VERSION 0.9-90 (2007-09-24)

    o   new defaults for `control' argument of `cforest': unbiased

        forests are now grown by default

    o   new defaults for binary classification tree visualization:

        stacked bar charts are used by default.

                CHANGES IN party VERSION 0.9-14 (2007-07-23)

    o   fix problem in `varimp' introduced by new weights handling

                CHANGES IN party VERSION 0.9-13 (2007-07-23)

    o   update `mvt.f'

    o   improve the memory footprint of RandomForest objects

        substancially (by removing the weights slots from each node).

        More careful revision of the predict and fitting code is needed.

    o   predictions for cforest with multivariate response are

        now returned in a matrix (should be a data.frame)

    o   remove confusing `no admissible split found' warning 

        (which simply meant that the `minsplit' wasn't met).

                CHANGES IN party VERSION 0.9-12 (2007-06-28)

    o   adjust to coin 0.6-4

                CHANGES IN party VERSION 0.9-11 (2007-06-11)

    o   populate `where' slot in `mob' objects.

    o   `mob_control' now has an `na.action' argument

    o   cforest with replace = FALSE, fraction = ...

        can now deal with weights (spotted by Carolin Strobl

        <carolin.strobl@stat.uni-muenchen.de>)

    o   interface to LAPACK (`dgesdd' for computing a SVD)

        directly. As a side-effect, the svdmem class can be 

        simplified and no memory allocation during 

        tree growing is necessary (which results in a measureable

        performance gain)

                CHANGES IN party VERSION 0.9-10 (2007-02-28)

    o   internal infrastructure for fit(x, y) interfaces,

        including a VariableFrame method for matrices.

    o   deal with factors with only one level and variables where

        all observations are NA

    o   don't compute design matrices in `ModelEnvFormula'

                CHANGES IN party VERSION 0.9-9 (2007-02-02)

    o   internal changes to data objects: joint transformations

        only necessary for response variables (new class `ResponseFrame')

        but we need to distinguish between testing (using ranks, for

        example) and prediction (means of raw data!).

        Problem spotted by Henric Nilsson <nilsson.henric@gmail.com>.

                CHANGES IN party VERSION 0.9-8 (2007-01-15)

    o   thicker median lines in boxplots

                CHANGES IN party VERSION 0.9-7 (2007-01-15)

    o   fix problems with multivariate response variables

        (spotted by Henric Nilsson <henric.nilsson@sorch.se>)

                CHANGES IN party VERSION 0.9-6 (2006-11-28)

    o   R-2.5.0 does not allow to change the storage.mode of factors

                CHANGES IN party VERSION 0.9-5 (2006-10-27)

    o   adjusted p values computed with testtype = "MonteCarlo"

        did not take dimensionality of the underlying linear statistics

        into account. It is now ensured that _p values_ are resampled,

        not test statistics.

    o   fix escape problems

                CHANGES IN party VERSION 0.9-4 (2006-09-15)

    o   make sure `maxsurrogates' exceeds number of input variables

    o   fix problems reported by valgrind

                CHANGES IN party VERSION 0.9-3 (2006-09-08)

    o    don't call RNG functions in mvt (this is done in C code, once)

                CHANGES IN party VERSION 0.9-2 (2006-09-07)

    o    mob() can't currently handle missing values,

         they are removed and a warning is given.

    o    add `methods' and `vcd' to Depends:

                CHANGES IN party VERSION 0.9-0 (2006-08-31)

    o    node_barplot() can now also draw stacked barplots.

    o    simplify handling of ordinal variables. It is now possible

         to have multiple (ordinal) response variables.

    o    some documentation updates

    o    fix problems with NA handling for factors

    o    make sure minsplit criterion applies in the presence of missing

         values. Bug spotted by Han Lee <Han.Lee@geodecapital.com>.

                CHANGES IN party VERSION 0.8-8 (2006-08-23)

    o    export `varimp' (variable importance measures for cforest())

    o    documentation updates

    o    add codetools checks

                CHANGES IN party VERSION 0.8-7 (2006-07-17)

    o    REAL(NULL) now gives an error in C code and scores could be 

         potentially NULL: fixed for the time being.

    o    add `show' method for BinaryTree and RandomForest objects

                CHANGES IN party VERSION 0.8-6 (2006-05-22)

    o    add some validity checks for hyper parameters

    o    add function `varimp' for computing variable importance

         measures for some random forests (this is still experimental and

         thus not exported yet, so use `party:::varimp')

                CHANGES IN party VERSION 0.8-5 (2006-04-25)

    o    all hyper parameters to `cforest' are now controlled using

         objects of a new class `ForestControl' which can be created using

         `cforest_control()'. 

    o    sampling of a fraction of the observations without replacement

         is now available for the `cforest' implementation of random forest.

                CHANGES IN party VERSION 0.8-4 (2006-04-04)

    o    renamed argument `teststattype' to `teststat' with defaults

         c("quad", "max") in order to be compatible with the `coin' package, 

         version >= 0.4-5

    o    use `1 - (1 - p)^k' instead of `p * k' for Bonferroni-adjustment.

         Node 7 for the `GlaucomaM' data is now splitted in addition (in tms).

                CHANGES IN party VERSION 0.8-3 (2006-03-20)

    o   `predict' returned nonsensical results in case a tree was 

        fitted to a multivariate response variable. Now a list with one

        element for each observation is returned.

                CHANGES IN party VERSION 0.8-2 (2006-03-01)

    o    plotting buglets fixed: improved axis in MOB plots,

         correct (transparent) background on jpeg() and png() devices.

        CHANGES IN `party' VERSION 0.8-1 (2006-02-23)

    o    `testtype' can be Bonferroni, MonteCarlo, Univariate and

         Teststatistic (instead of Raw)     

    o    removed unnecessary constraint on weights in `cforest'

    o    maximize raw test statistics for random forest by default.

        CHANGES IN `party' VERSION 0.8-0 (2006-02-15)       

    o    `cforest', an implementation of Breiman's random forest ensemble

         algorithm based on conditional inference trees (`ctree') has been

     added. It is somewhat experimental and thus for advanced users only.

    o    `mob', an object-oriented implementation of a recently suggested

         algorithm for model-based recursive partitioning (Zeileis, Hothorn,

     Hornik, 2005) has been added. It works out of the box for partitioning

     (generalized) linear regression models, others can be easily plugged

     in. A new vignette "MOB" describes the implementation ideas and provides

     a few examples.

    o    new S3 generic reweight() with methods for (g)linearModel

         for re-fitting a model with different weights.

    o    new argument `maxdepth' to `ctree_control' which allows for

         growing trees of a fixed maximum depth.

    o    LazyData: yes

        CHANGES IN `party' VERSION 0.3-6 (2006-02-06)

    o    use a different way to deal with NAMESPACEs during in tests/*.R

         following a suggestion by Prof. Brian D. Ripley

    o    use LazyLoad: yes instead of SaveImage: yes

        CHANGES IN `party' VERSION 0.3-5 (2006-02-02)

    o    make R CMD check happy and move src/README to inst/README

        CHANGES IN `party' VERSION 0.3-4 (2006-01-18)

    o    documentation updates

        CHANGES IN `party' VERSION 0.3-3 (2006-01-18)

    o    some new convenience functions, not exported

        CHANGES IN `party' VERSION 0.3-2 (2006-01-12)

    o    isequal must not check equality of attributes

        CHANGES IN `party' VERSION 0.3-1 (2005-12-02)

    o    fix bug introduced in version 0.3-0: coin:::factor_trafo applies

         treatment contrasts in case of a binary factor but we need the full

         design matrix

    o    documentation updates

        CHANGES IN `party' VERSION 0.3-0 (2005-11-29)

    o    `ytrafo' and `xtrafo' functions make use of `coin:::trafo' now,

         i.e. the handling of influence functions and transformations

         has been unified in packages `party' and `coin'

        CHANGES IN `party' VERSION 0.2-10 (2005-11-08)

    o    new slot `data' in BinaryTree objects, slots inputnames and levels 

         have been removed

        CHANGES IN `party' VERSION 0.2-9 (2005-10-19)

    o    splits in categorical variables could have failed due 

         to weired internal checks

        CHANGES IN `party' VERSION 0.2-8 (2005-08-06)

    o    fix problems reported by codetools

        CHANGES IN `party' VERSION 0.2-7 (2005-08-31)

    o    extract inputs using menv@get("input", data = newdata) in predict

        CHANGES IN `party' VERSION 0.2-6 (2005-08-29)

    o   make gfortran happy

        CHANGES IN `party' VERSION 0.2-5 (2005-08-19)

    o    ctree() now searches the global environment for variables given

         in `formula' when the `data' argument is unspecified.

        CHANGES IN `party' VERSION 0.2-4 (2005-07-07)

    o    names of `criterion' element in `SplittingNode' objects were wrong

    o    categorical splits with `ctree_control(testtype = "MonteCarlo")'

         were potentially wrong

        CHANGES IN `party' VERSION 0.2-3 (2005-06-29)

    o   print and plot only levels which are available in a node (for nominal

        splits)

        CHANGES IN `party' VERSION 0.2-2 (2005-06-27)

    o   ./src/Makedeps will be automatically generated (on Windows)

        and must not be part of the source-package.

    o   vignette cosmetics