.. -*- mode: rst -*-

.. _chap_changelog:

.. index:: changelog

*********************
Development Changelog
*********************

This changelog only lists rather macroscopic changes to PyMVPA. The full VCS
changelog for 2.x series of PyMVPA is available here:

  https://github.com/PyMVPA/PyMVPA/commits/master

.. note::
   You could find relevant information on 0.4.x series at
   http://v04.pymvpa.org .

In addition there is also a somewhat unconventional `visual changelog`_.

.. _visual changelog: http://www.pymvpa.org/history.html

'Closes' and 'Fixes' statement IDs refer to the Debian and Github bug
tracking systems accordingly and can be queried by visiting the URLs::

  http://bugs.debian.org/<closed bug id>

  https://github.com/PyMVPA/PyMVPA/issues/<fixed bug id>

Releases
========

* 2.6.6 (???, ??? ?? 2018)

  A bugfix release

  * Fixes
    -

  * New functionality
    -

  * Enhancements
    -

* 2.6.5 (Tue, Jun 26, 2018)

  A minor release with some bugfixes and new exciting functionality

  * Fixes
    - Exception message handling in niml module
    - Sort unique values in the fallback handling of AttrCollection.unique
    - prep-afni-surf should be compatible with matplotlib 2.0.0
    - Scatter plot should be more robust to degenerate data

  * New functionality
    - :class:`~mvpa2.algorithms.connectivity_hyperalignment.ConnectivityHyperalignment`

  * Enhancements
    - `preallocate_output` parameter for :class:`~mvpa2.measures.searchlight.Searchlight`

* 2.6.4 (Mon, Jan 29 2018)

  A bugfix release

  * Fixes
    - compatibility with :mod:`pywt` >= 0.4
    - compatibility with :mod:`scipy.stats` >= 0.17.0 for `chisqprob`

  * Enhancements
    - make `h5save` "robust" in the presence of file locks - wait for a while
      to acquire the lock
    - consult :mod:`pkg_resources` about versions of external packages if no
      `__version__` was found


* 2.6.3 (Fri, Nov 03 2017)

  Minor bugfix release -- getting ready for conda-forge

  * Fixes
    - variety of tune ups to test to pass all around
    - minor fixes to scatter and chunks plots


* 2.6.2 (Tue, Oct 31 2017)

  Primarily a bugfix release

  * Fixes
    - fixed scaling in ProcrusteanMapper (gh-545). So if you are using
      Hyperalignment, you better re-pre-process, and do not mix results/transformations
      across versions of the PyMVPA
    - numpy 1.13.1 compatibility fixes
    - documentation: urls and building fix ups
    - some fixes for Python3 compatibility in hdf5 (h5save/h5load) support
    - use single line affine matrix representation in pymvpa2-prep-afni-surf
    - saving large .niml files should not crash now

  * New functionality
    - :func:`~mvpa2.misc.errorfx.mean_tpr` and :func:`~mvpa2.misc.errorfx.mean_fnr`
      error functions (to be used in disbalanced datasets)


* 2.6.1 (Fri, Apr 14 2017)

  Primarily a bugfix release

  * Fixes

    - Deprecation: fixed typo in `manhattan_distance`
    - Documentation: various outdated links and project names fixed
    - Removed spurious quote within command line invocation of `prep-afni-surf`
    - Fixed computation of the edge lengths on the surface, which could have
      resulted in slightly incorrect surface searchlight sizes

  * New functionality

    - :class:`~mvpa2.measures.rsa.CDist` for cross-validated dissimilarity
      measures computation

  * Enhancements

    - :class:`~mvpa2.algorithms.hyperalignment.Hyperalignment`
      - `output_dim` option could be used to perform dimensionality reduction
        via SVD while composing the common space
      - `nproc` and `joblib_backend` parameters could be used to parallelize the
        last step of the alignment

* 2.6.0 (Sat, 26 Aug 2016)

  Primarily a bugfix release with some added new functionality.  People contributed
  code to the release: Matteo Visconti dOC, Yaroslav Halchenko, Nikolaas N. Oosterhof,
  Feilong Ma, Christopher J. Markiewicz, Swaroop Guntupalli.

  * **IMPORTANT** possibly backward-incompatible fixes

    - Dataset's :func:`~mvpa2.base.dataset.vstack` and :func:`~mvpa2.base.dataset.hstack`
      now by default would drop those feature or sample (`fa`, `sa`) attributes
      which do not have the same value across all datasets ("drop_nonunique").
      Previous behaviour was to update aggregated collections, so the attribute
      value of the last dataset would have been stored in the stacked dataset.
      Such behaviour could be brought back by `fa="update"` for `vstack` or
      similar value for `sa="update"` for `hstack` calls.
      If you find that some `sa`/`fa` you have relied on using in your code is no
      longer available after stacking, verify that you did intend to maintain the
      "last known" value, and adjust argument in stacking function to "update".

  * Fixes

    - Fixed minor bug in computing ico linear divisions while working with surfaces
    - Handling of `ref_ds` in :class:`~mvpa2.algorithms.searchlight_hyperalignment.SearchlightHyperalignment`
    - Compatibility fixes for :mod:`scipy` 0.18.0 and :mod:`nibabel` 2.1.0.


  * New functionality

    - `pymvpa2 scatter` command line and :mod:`~mvpa2.misc.plot.scatter` module to scatter plot
      datasets and nifti volumes, with coloring based on spatial location (see
      e.g. `OHBM12 poster <http://haxbylab.dartmouth.edu/publications/HGG+12_sfn12_famfaces.png>`__
      for an example, proper demo is coming)

  * Enhancements

    - Allow for "4D" mri mask volumes with degenerate time dimension (e.g. coming
      from AFNI)
    - `pymvpa2 ttest` could operate now on h5save'd datasets
    - It is possible now to `h5save` trained Hyperalignment instances
    - :class:`~mvpa2.generators.resampling.Balancer` and
      :class:`~mvpa2.generators.permutation.AttributePermutator` now got `rng`
      argument to seed RNG.  Please use an `int` as a seed specification if you
      want random selections/permutations be consistent across searchlights


* 2.5.0 (Thu, 12 May 2016)

  * Fixes

    - Various python3 related small fixes
    - Minor fix allowing adhoc searchlights (e.g. gnbsearchlight) to work with
      CustomPartitioner
    - Fixed SmartVersion to not infinitely loop upon receiving an awkward
      version string

  * New functionality

    - :class:`~mvpa2.algorithms.searchlight_hyperalignment.SearchlightHyperalignment`
      to carry out full-datset/brain hyperalignment of functional data while
      honoring spatial neighborhoods.
      See :ref:`Guntupalli et al., Cerebral Cortex (2016) <GHH+16>` A Model of
      Representational Spaces in Human Cortex for more information
    - :class:`~mvpa2.measures.rsa.Regression` measure to compute regularized
      regression (Ridge or Lasso) on the computed neural dissimilarity matrix
    - :class:`~mvpa2.misc.surfing.queryengine.SurfaceRingQueryEngine`


  * Enhancements

    - The ``ofmotionqc`` command line command has been renamed to
      ``plotmotionqc``. It no longer requires a dataset formatted in
      OpenFMRI-style, but works with any organization of input data
    - SplitRFE docstring example reordered suggested mappers (l2 -> abs -> mean)
    - Show only summary of representation of internal _src2aux of
      VolumeMaskDictionary object, which otherwise could be too big to print

* 2.4.3 (Tue, 15 Mar 2016)

  * Fixes

    - Fixed memory leaking in libsvm bindings introduced in 2.4.2 (gh-443)
    - Avoid overriding parameters defined in subclasses with the ones from
      super class
    - Address freshish deprecations (warnings) in sklearn, scipy, etc
    - Workaround in the test for numpy's corrcoef issue resulting in corrcoef
      a bit outside of [-1, 1] range


* 2.4.2 (Tue, 8 Mar 2016)

  * Fixes

    - *Important:*
      Reverse mapping of some chained Flatten/StaticSelection mappers did not
      work correctly e.g. if you selected some features from already masked
      fmri_dataset. This could have resulted in incorrect cluster counts by
      :class:`~mvpa2.algorithms.group_clusterthr.GroupClusterThreshold`.  Please
      recreate your datasets and re-estimate GroupClusterThreshold if that was
      the case for you
    - ad-hoc searchlights (gnb, m1nn) can now operate with partitioners which
      leave some samples out of training and testing sets.  Also `splitter` argument
      was added to them for greater flexibility
    - Due to the bug in OpenfMRI datasets' TR within NIfTIs being hardcoded to
      wrong 1.0, so `scan_key.txt` will now be consulted if TR is 1 in the .nii*
    - Compatibility with :mod:`~numpy` 1.10 fixes
    - :class:`CachedQueryEngine` acquired .ids making it compatible with some
      ad-hoc searchlights
    - `FeatureSelection` acquired `__iadd__` fixing the incorrect behavior upon
      reverse after a sequence of feature selections

  * Deprecations/removal

    - `Hamster` is gone.

  * Enhancements

    - Bundled version of libsvm updated to 3.12.  Now includes maxiter
      setting which prevents infinite looping which can happen in some rare cases
    - A swarm of stylistic improvements ("is not", PEP8, etc) which should not
      affect functionality but could result in more robust operation
    - `CrossValidation` can now operate with a None generator (i.e. partitioner) using
      solely `Splitter` to generate a single split on original dataset.  Provides easier
      means for "cross-classification"
    - :class:`~mvpa2.measures.nnsearchlight.M1NNSearchlight` can now do classification
      based on correlation distance (just provide `dfx=one_minus_correlation` to kNN)
    - libsvm bindings for SVM were refactored to interface via svmc not _svmc interface,
      which made them also compatible with swig 3.x
    - :meth:`~mvpa2.base.dataset.AttrDataset.to_npz` and :meth:`~mvpa2.base.dataset.AttrDataset.from_npz`
      to interface Datasets through NumPy's npz files
    - Variety of PEP8 and other tune ups for more readable code
    - :class:`~mvpa.featsel.rfe.SplitRFE` can now work with static measures (e.g.
      `OneWayAnova`) and `BinaryFxFeaturewiseMeasure`.  So do feature selection
      with nested cross-validation without double-dipping!


  * New functionality

    - :class:`~mvpa2.generators.partition.FactorialPartitioner` for factorial designs
      to cross-validate across sub-ordinate category samples (more efficient/avoids
      previously recommend ChainMapper of NFoldPartitioner and Sifter)


* 2.4.1 (Wed, 18 Nov 2015)

  * New functionality

    - :class:`~mvpa.datasets.gifti` can write GIFTI files that contain both
      dataset samples and surface anatomy (vertices and faces). Such GIFTI
      files can be read by FreeSurfer.

  * Deprecations/removal

    - :file:`tools/niils` -- tool removed, since the functionality was moved into
      :mod:`nibabel` under the name `nib-ls`
    - Drop support for nibabel < 2.0.0

  * Enhancements

    - "Native" use of :mod:`~duecredit` to provide citations for PyMVPA itself
      and functionality/methods it implements.
    - Unified use of os.path.join as pathjoin.
    - :class:`~mvpa.mappers.procrustean.ProcrusteanMapper` computes reconstruction
      now more efficiently (just a transpose with proper scaling) in case of
      non-oblique transformations.

  * Refactorings/misc changes

    - :class:`~mvpa.mappers.procrustean.ProcrusteanMapper` now just returns transpose
      in reverse if transformation is non-oblique (instead of an explicit inverse).

  * Fixes

    - 2.4.0 was released with incorrect `__version__` (as 2.3.1)
    - Fixes to `ofmotionqc` command implementation
    - Variety of fixes for compatibility with recent matplotlib, python3
    - Fixes to SVDMapper in reverse when projection is not a matrix


* 2.4.0 (Mon, 11 May 2015)

  * New functionality

    - Support for CoSMoMVPA (http://cosmomvpa.org) in
      :mod:`~mvpa2.datasets.cosmo` providing dataset input/output
      (:meth:`~mvpa2.datasets.cosmo.cosmo_dataset` and
      :meth:`~mvpa2.datasets.cosmo.map2cosmo`) and neighborhood input
      (:class:`~mvpa2.datasets.cosmo.CosmoQueryEngine`). This allows for
      for running searchlights (:class:`mvpa2.datasets.cosmo.CosmoSearchlight`)
      on data from CoSMoMVPA (fMRI and MEEG).
    - :func:`~mvpa2.datasets.miscfx.remove_nonfinite_features` removes
      features with non-finite values, i.e. NaNs or Infs, for any sample.
    - :func:`~mvpa2.misc.stats.binomial_proportion_ci` for computing
      confidence intervals on proportions of Bernoulli trial outcomes.
    - New mapper for removing sample means from features:
      :class:`~mvpa2.mappers.fx.MeanRemoval`
    - New algorithm for statistical evaluation of clusters in accuracy maps
      of group-based searchlight classification analyses. This is essentially
      an improved implementation of Stelzer et al., NeuroImage, 2013:
      :class:`~mvpa2.algorithms.group_clusterthr.GroupClusterThreshold`
    - New identity mapper. Does nothing, but goes were only mappers can go.
    - Simplified selection of samples/feature in a dataset. One can now
      specify sets of attribute values to define sample/feature subsets.
    - IO adaptor for OpenFMRI-formated datasets:
      :class:`~mvpa2.datasets.sources.native.OpenFMRIDataset`.
      Load arbitrary bits from such
      a dataset, or automatically build event-related dataset (optionally with
      NiPy-based HRF-modeling).  `tutorial_data_25mm` was converted to
      OpenFMRI layout and extended also with `1slice` flavor.
    - New command line command to generate a motion plot for an
      OpenFMRI-formated dataset.
    - New convenience functions for boxplots and outlier detection.
    - Reincarnated (similar functionality was removed for 2.0 release)
      convenience methods (
      :meth:`~mvpa2.base.collections.UniformLengthCollection.match` and
      :meth:`~mvpa2.datasets.base.Dataset.select`)
      to ease selecting parts of a dataset
    - New command line component ``ttest`` to compute a simple T-test
      across dataset samples.

  * Enhancements

    - :class:`~mvpa2.mappers.flatten.ProductFlattenMapper` accepts
      explicit names of factors in the constructor.
    - HollowSphere() can now, optionally, include the center feature.
    - :func:`~mvpa2.datasets.mri.fmri_dataset` no longer stores original copy
      of the NIfTI file header -- it converts it to `dict` representation to
      remain portable. Use :func:`~mvpa2.datasets.mri.strip_nibabel` to convert
      old datasets to new format if/when necessary.
    - Datasets created with :func:`~mvpa2.datasets.mri.fmri_dataset` do no
      longer contain instances of NiBabel classes. This improves robustness of
      re-loading serialized datasets in environments with changing NiBabel
      version. All previous functionality remains available. Dataset now
      contain an additional ``imgaffine`` attribute with the affine
      transformation of the source image.

  * Fixes

    - :class:`~mvpa2.algorithms.hyperalignment.Hyperalignment` with regularization
      (alpha != 1.0) was producing incorrect transformations because they were
      driven by offsets of the last subject.  Fixed by not "auto_train"ing
      regularization projection.
    - :func:`~mvpa2.misc.plot.lightbox.plot_lightbox` should take a
      slice index from the last dimension, not the leading one if no
      `slices` argument was provided.
    - Improved Python3k compatibility in :mod:`~mvpa2.base.state`,
      :mod:`~mvpa2.tests`, and :mod:`~mvpa2.clfs.stats` modules, and in
      libsvmlrc msvc building.
    - Partial fix for compatibility with ancient scipy on SPARC using
      :mod:`~mvpa2.datasets.cosmo`.
    - Various fixes for example scripts and documentation snippets.
    - :class:`~mvpa2.mappers.skl_adaptor.SKLTransformer` can now deal with
      ``transform()`` implementations that do not support a ``y`` argument.


* 2.3.1 (Tue, 20 May 2014)

  Primarily a bugfix release pushed out to avoid mvpa2.suite meltdown
  if new scipy 1.4.0 is used.

  * API changes

    - Deprecation: :class:`~mvpa2.base.param.Parameter` now uses `constraints` argument
      of type :class:`~mvpa2.base.constraints.Constraint` instead of string
      `allowedtype`.  `allowedtype` argument will be removed completely in the
      future 2.4 release.

  * New changes

    - :mod:`~mvpa2.clfs.dummies` now provides utterly useful
      :class:`~mvpa2.clfs.dummies.RandomClassifier` and others for code testing
      which could also be used to verify absent double-dipping etc.

  * Enhancements

    - :class:`~mvpa2.mappers.fx.FxMapper` now will provide consistent order
      of groups of items.  It also got a new argument `order` with available
      value of 'occurrence' to that groups would get ordered by their occurance
      in the original dataset.

  * Fixes

    - :class:`~mvpa2.mappers.corrstability.CorrStability` should be able to
      deal with other sample attributes (not only 'targets') and should divide
      by variance correctly to provide correlation coefficient as output.
    - robustify check scipy's rdist which should avoid crash upon import of
      mvpa2.suite because of stripped down scipy 1.4.0 API.
    - various typos in docstrings (we do welcome contributions ;) ).

* 2.3.0 (Thu, 5 March 2014)

  * **Warning**: Due to a significant number of new features and some internal
    changes, loading of HDF5 files saved with previous versions might be
    impaired.

  * New functionality (>73 commits)

    - Multi-threaded, surface-based searchlight queryengine
      :func:`~mvpa2.misc.surfing.queryengine.disc_surface_queryengine`
      supporting as output space either surfaces
      (:class:`~mvpa2.misc.surfing.queryengine.SurfaceVerticesQueryEngine`;
      recommended) or volumes
      (:class:`~mvpa2.misc.surfing.queryengine.SurfaceVoxelsQueryEngine`).
    - :class:`~mvpa2.misc.plot.flat_surf.FlatSurfacePlotter` supporting
      flattened cortical surfaces.
    - I/O support for AFNI NIML (dset,
      :mod:`~mvpa2.support.nibabel.afni_niml_dset`; annotation,
      :mod:`~mvpa2.support.nibabel.afni_niml_annot`), AFNI 1D datasets
      (:mod:`~mvpa2.support.nibabel.afni_suma_1d`), SUMA surface specification
      (:mod:`~mvpa2.support.nibabel.afni_suma_spec`), Freesurfer ASCII surfaces
      (:mod:`~mvpa2.support.nibabel.surf_fs_asc`), GIFTI surfaces
      (:mod:`~mvpa2.support.nibabel.surf_gifti` through nibabel).
      Input support for Caret
      binary surfaces (:mod:`~mvpa2.support.nibabel.surf_caret`), EEGlab ASCII
      (:meth:`mvpa2.datasets.eeglab.eeglab_dataset`), AFNI NIML ( ROI,
      :mod:`~mvpa2.support.nibabel.afni_niml_roi`).
    - Experimental support for saving AttrDataset files directly to NIML format
      using :mod:`~mvpa2.datasets.niml`.
    - Freesurfer/AFNI/SUMA preprocessing wrapper script
      ``pymvpa2-prep-afni-surf`` for surface-based analyses.
    - Winner-take-all measures :mod:`~mvpa2.measures.winner`.
    - New command line interface that provides access to the most commonly
      used functionality (dataset creation, pre-processing, cross-vlaidation,
      searchlights and data export).
    - :class:`~mvpa2.mappers.glm.GLMMapper for data transformation into
      parameter estimates of a general linear model (built from pre-defined
      regressors and/or dataset sample attributes. Two implementations with
      different features are provided:
      :class:`~mvpa2.mappers.glm.statsmodels_glm.StatsmodelsGLMMapper` and
      :class:`~mvpa2.mappers.glm.nipy_glm.NiPyGLMMapper`.
    - Spectral filtering mapper :class:`~mvpa2.mappers.filters.IIRFilter`.

  * Enhancements (>130 commits)

    - :func:`~mvpa2.datasets.mri.fmri_dataset` load support for AFNI NIFTI
      volumes with time in the fifth dimension (data is automagically squeezed
      to 4D).
    - :func:`~mvpa2.datasets.mri.map2nifti` sets ``cal_`` fields to correspond
      to the range of the data.
    - Many parts of the tutorial were reworked, set of examples expanded, and
      also converted to IPython notebooks.
    - :func:`~mvpa2.datasets.eventrelated` extended to output GLM regression
      fits as features from HRF models (relying on NiPy for GLM modeling).
    - Class parameters now support programatic validation of values,
      auto-generated documentation and improved error messages.
    - More informative progress bar for long running processes, such as
      searchlights.
    - Replace all (broken) implementations for similarity structure analyses
      with new measures for computing pairwise pattern distances, and their
      consistency, or similarity to a target structure
      (:mod:`~mvpa2.measures.rsa`).
    - New examples to show integration with scikit-learn implementations of
      classification, regression, and data transformation algorithm.

  * Fixes (>88 commits)

    - Makefile fetch-data retrieves the data correctly.
    - HDF5 backend fixes to deal with nested/recursive structures and higher
      tolerance in loading HDF5 from older version.


* 2.2.0 (Sun, Sep 16 2012)

  * New functionality (14 commits)

   - New HDF5-based storage backend for
     :class:`~mvpa2.measures.searchlight.Searchlight` the can significantly
     speed up serialization of large result dataset in parallelized
     computations.
   - New fast searchlight
     :class:`~mvpa2.measures.nnsearchlight.M1NNSearchlight` (and
     helper :func:`~mvpa2.measures.nnsearchlight.sphere_m1nnsearchlight`) to
     run mean-1-nearest-neighbor searchlights.
   - New mappers for adding an axis to a dataset
     (:class:`~mvpa2.mappers.shape.AddAxisMapper`), and for transposing a
     dataset (:class:`~mvpa2.mappers.shape.TransposeMapper`).
   - Improved implementation of SciPy's :func:`~mvpa2.misc.stats.ttest_1samp`
     with support for masked arrays and alternative hypotheses.
   - Individual tutorial chapters are now available for download as IPython
     notebooks. A ``rst2ipynb`` converter is available in ``tools/``.
   - New ``pymvpa2-tutorial`` command line utility to start a PyMVPA tutorial
     session, either in a console IPython session, or using the IPython
     notebook server.
   - New wrapper functions for data generators/loaders in ``sklearn.datasets``,
     available in :mod:`mvpa2.datasets.sources.sklearn_data`.

  * Enhancements (89 commits)

    - Initial Python 3 compatibility (spear-headed by Tiziano Zito).
    - Bayesian hypothesis testing with
      :class:`~mvpa2.clfs.transerror.BayesConfusionHypothesis` now supports
      literal hypotheses specification, custom hypotheses subsets, and
      computing of posterior probabilities.
    - Allow for accessing fitted distributions in
      :class:`~mvpa2.clfs.stats.MCNullDist`.
    - Extensions and improvements to the tutorial chapter on statistical
      evaluation.
    - Expose distance function as a property `dfx` of
      :class:`~mvpa2.clfs.knn.kNN`.
    - Extended :class:`~mvpa2.generators.base.Sifter` with ability to discard
      unbalanced partitions.
    - :func:`~mvpa2.base.hdf5.h5save` now creates missing directories
      automatically by default.
    - Dedicated training for
      :class:`~mvpa2.algorithms.hyperalignment.Hyperalignment`, and new
      auto-train capability.
    - :class:`~mvpa2.clfs.transerror.BayesConfusionHypothesis` now computes
      optional posterior probabilities, and supports hypothesis definitions
      using literal labels.

  * API changes

    - All command line tools have been renamed to have a consistent 'pymvpa2-'
      prefix.

  * Fixes (77 commits)

    - HDF5 now properly stores object-type ndarray, where it the array shape
      was unintentionally modified on-load before (Fixes #84).
    - HDF5 can now reconstruct 'builtin' objects (Fixes #86).
    - Check value data type and convert to float when collecting performance
      statistics to avoid numerical problems.
    - Do not fail in :class:`~mvpa2.clfs.transerror.BayesConfusionHypothesis`
      when a dataset does not provide class labels.

* 2.1.0 (Fri, June 29 2012)

  * Fixes

    - :func:`~mvpa2.misc.support.mask2slice` failed to convert an array of
      ``False`` values into ``slice(None, 0, None)`` (Fixes #56).
    - A number of fixes to the HDF5 IO code that ignored parts of an object's
      state when custom ``__reduce__()`` implementations were used (Fixes #42),
      and had problems storing metaclass types (Fixes #78).
    - Proper single quotes in documentation code snippets within PDFs.
    - Memory leak (model pointer) in LIBSVM bindings.

  * Enhancements

    - All searchlight implementations can now optionally store the IDs of all
      features for each generated ROI (conditional attr. ``roi_feature_ids``)
    - Add :func:`~mvpa2.misc.neighborhood.scatter_neighborhoods` to aid
      sparse sampling of spaces.
    - Add :class:`~mvpa2.clfs.transerror.ConfusionMatrixError` to compute
      confusion matrices with an error function interface (e.g. for
      ``CrossValidation(errorfx=...)``). This class existed for a long time, but
      was hidden in the unit tests.
    - Add :class:`~mvpa2.clfs.transerror.Confusion` to compute
      confusion matrices with a Node interface (e.g. for
      ``CrossValidation(postproc=...)``). This is useful if confusion matrices
      are necessary as an intermediate result and further processing with
      other nodes is desired.

  * New functionality

    - Add :class:`~mvpa2.clfs.transerror.BayesConfusionHypothesis` to perform
      Bayesian hypothesis testing of multi-class confusion statistics. This is
      useful to assess the likelihood of a particular (or all possible)
      grouping of classes being distinguishable.
    - Add :class:`~mvpa2.mappers.fxy.FxyMapper` to perform arbitrary
      computations involving two datasets.
    - Add :class:`~mvpa2.mappers.base.CombinedMapper` to run a dataset through
      a set of mappers and combine their outputs.
    - Add :class:`~mvpa2.measures.statsmodels_adaptor.UnivariateStatsModels` a wrapper
      for using models from the statsmodels_ package as a
      FeaturewiseMeasure.
    - Add :class:`~mvpa2.misc.dcov.dCOV` and
      :func:`~mvpa2.misc.dcov.dcorcoef` to quantify independence of
      (multivariate) signals.

  * API changes

    - Deprecating ``GLM`` that is now implemented with UnivariateStatsModels.
      This deprecated GLM class no longer supports the ``zstat`` calculation,
      and none of its previous conditional attributes are available anymore.

* 2.0.1 (Tue, Mar 27 2012)

  Primarily a bugfix release

  * Fixes (21 BF commits)

    - HDF5 storage -- handle loading of objects with bound
      ``builtin_function_or_method``.
    - Use system-wide ``autosummary/generate.py`` for sphinx >= 1.1.2
      (Closes: #658593).
    - :class:`~mvpa2.base.state.ConditionalAttribute` should not loose
      value in deepcopy when default off (Fixes #63).
    - Correct handling of scalar mean/std values for
      :class:`~mvpa2.mappers.zscore.ZScoreMapper`.
    - MRI data import via _img2data now works with unicode
      filenames (Fixes #60).
    - Should work with IPython >= 0.11 now (Fixes #59).
    - Various small fixes to improve tests and functionality.
    - Fix :class:`SMLR` segfaults on Windows (Thanks cgohlke for the patch).

  * Enhancements (29 ENH, OPT, and NF commits)

    - :class:`~mvpa2.mappers.fx.FxMapper` calls functions natively
      (instead of a slow row/column at a time) if they carry ``axis``
      as the 2nd argument.  Provides tremendous speed up for
      :func:`mean_sample` etc.
    - :func:`~mvpa2.misc.support.xrandom_unique_combinations`
      generator for random unique combinations.
    - :func:`~mvpa2.misc.fx.dual_gaussian` made more robust by not
      handling negative values for the standard deviations.
    - :func:`~mvpa2.misc.fx.dual_positive_gaussian`.
    - Expose "sensitivities" for :class:`PLR`.
    - :class:`~mvpa2.generators.partition.NFoldPartitioner` float
      option for ``cvtype`` and intelligent behavior on 'random'
      limited by 'count' given a large number of folds.
    - Add few additional learners from :mod:`sklearn` to the warehouses:
      ExtraTrees, RandomForest, LassoLarsIC.
    - ``__repr__`` for :class:`Partitioner`s.
    - Add new performance metric -- F1 score -- in the confusion matrix
      summary stats.
    - :class:`CachedQueryEngine` does not rely now on id but on the
      exact value of the query parameters (converted to hashable
      types). Before it could behave incorrectly on rare occasions.

  * API changes

    - Deprecating ``.splitattr`` if favor of ``.attr`` in
      :class:`mvpa2.generators.partition.Partitioner`

* 2.0.0 (Mon, Dec 19 2011)

  This release aggregates all the changes occurred between official
  releases in 0.4 series and various snapshot releases (in 0.5 and 0.6
  series).  To get better overview of high level changes see
  :ref:`release notes for 0.5 <chap_release_notes_0.5>` and :ref:`0.6
  <chap_release_notes_0.6>` as well as summaries of release candidates
  below

  * Fixes (23 BF commits)

    - Significance level in the right tail was fixed to include the
      value tested -- otherwise resulted in optimistic bias (or
      absurdly high significance in improbable case if all estimates
      having the same value).
    - Compatible with the upcoming IPython 0.12 and renamed sklearn
      (Fixes #57).
    - Do not double-train ``slave`` classifiers while assessing
      sensitivities (Fixes #53).

  * Enhancements (30 ENH + 3 NF commits)

    - Resolving voting ties in kNN based on mean distance, and
      randomly in SMLR.
    - :class:`kNN`\'s ``ca.estimates`` now contains dictionaries with
      votes for each class.
    - Consistent zscoring in :class:`Hyperalignment`.

* 2.0.0~rc5 (Wed, Oct 19 2011)

  * **Major**: to allow easy co-existence of stable PyMVPA 0.4.x, 0.6
    development ``mvpa`` module was renamed into mod:`mvpa2`.

  * Fixes

    - Compatible with the new Shogun 1.x series.
    - Compatible with the new h5py 2.x series.
    - :file:`mvpa-prep-fmri` -- various compatibility fixes and smoke testing.
    - Deepcopying :class:`SummaryStatistics` during __add__.

  * Enhancements

    - Tutorial uses :mod:`mvpa2.tutorial_suite` now.
    - Better suppression of R warnings when needed.
    - Internal attributes of many classes were exposed as properties.
    - More unification of ``__repr__`` for many classes.

* 0.6.0~rc4 (Wed, Jun 14 2011)

  * Fixes

    - Finished transition to :mod:`nibabel` conventions in `plot_lightbox`.
    - Addressed :mod:`matplotlib.hist` API change.
    - Various adjustments in the tests batteries (:mod:`nibabel` 1.1.0
      compatibility, etc)

  * New functionality

    -  Explicit new argument ``flatten`` to from_wizard -- default
       behavior changed if mapper was provided as well

  * Enhancements

    - Elaborated ``__str__`` and ``__repr__`` for some Classifiers and
      Measures

* 0.6.0~rc3 (Thu, Apr 12 2011)

  * Fixes

    - Bugfixes regarding the interaction of FlattenMapper and
      BoxcarMapper that affected event-related analyses.
    - `Splitter` now handles attribute value `None` for splitting
      properly.
    - `GNBSearchlight` handling of  ``roi_ids``.
    - More robust detection of mod:`scikits.learn` and :mod:`nipy`
      externals.

  * New functionality

    - Added a `Repeater` node to yield a dataset multiple times and
      `Sifter` node to exclude some datasets. Consequently, the
      "nosplitting" mode of `Splitter` got removed at the same time.
    - :file:`tools/niils` -- little tool to list details
      (dimensionality, scaling, etc) of the files in nibabel-supported formats.

  * Enhancements

    - Numerous documentation fixes.
    - Various improvements and increased flexibility of null distribution
      estimation of Measures.
    - All attribute are now reported in sorted order when printing a dataset.
    - `fmri_dataset` now also stores the input image type.
    - `Crossvalidation` can now take a custom `Splitter` instance. Moreover, the
      default splitter of CrossValidation is more robust in terms of number and
      type of created splits for common usage patterns (i.e. together with
      partitioners).
    - `CrossValidation` takes any custom Node as ``errorfx`` argument.
    - `ConfusionMatrix` can now be used as an ``errorfx`` in Crossvalidation.
    - ``LOE(ACC): Linear Order Effect in ACC`` was added to
      `ConfusionMatrix` to detect trends in performances across
      splits.
    - A `Node`\ s postproc is now accessible as a property.
    - `RepeatedMeasure` has a new 'concat_as' argument that allows results to be
      concatenated along the feature axis. The default behavior, stacking as
      multiple samples, is unchanged.
    - `Searchlight` now has the ability to mark the center/seed of an ROI in
      with a feature attribute in the generated datasets.
    - ``debug`` takes ``args`` parameter for delayed string
      comprehensions.  It should reduce run-time impact of ``debug()``
      calls in regular, non ``-O`` mode of Python operation.
    - String summaries and representations (provided by ``__str__``
      and ``__repr__``) were made more exhaustive and more coherent.
      Additional properties to access initial constructor arguments
      were added to variety of classes.

  * Internal changes

    - New debug target ``STDOUT`` to allow attaching metrics
      (e.g. traceback, timestamps) to regular output printed to stdout
    - New set of decorators to help with unittests

      - ``@nodebug`` to disable specific debug targets for the duration
        of the test.
      - ``@reseed_rng`` to guarantee consistent random data given
        initial seeding.
      - ``@with_tempfile`` to provide a tempfile name which would get
        removed upon completion (test success or failure)

    - Dropping daily testing of ``maint/0.5`` branch -- RIP.
    - `Collection`\ s were provided with adequate ``(deep|)copy``.
      And `Dataset` was refactored to use `Collection`\ s ``copy``
      method.
    - ``update-*`` Makefile rules automatically should fast-forward
      corresponding ``website-updates`` branch
    - `MVPA_TESTS_VERBOSITY` controls also :mod:`numpy` warnings now.
    - `Dataset.__array__` provides original array instead of copy
      (unless dtype is provided)

  Also adapts changes from 0.4.6 and 0.4.7 (see corresponding
  changelogs).

* 0.6.0~rc2 (Thu, Mar 3 2011)

  * Various fixes in the mvpa.atlas module.

* 0.6.0~rc1 (Thu, Feb 24 2011)

  * Many, many, many
  * For an overview of the most drastic changes :ref:`see constantly
    evolving release notes for 0.6 <chap_release_notes_0.6>`

* 0.5.0 (sometime in March 2010)

  This is a special release, because it has never seen the general public.
  A summary of fundamental changes introduced in this development version
  can be seen in the :ref:`release notes <chap_release_notes_0.5>`.

  Most notably, this version was to first to come with a comprehensive two-day
  workshop/tutorial.

* 0.4.7 (Tue, Mar 07 2011) (Total: 12 commits)

  A bugfix release

  * Fixed

    - Addressed the issue with input NIfTI files having ``scl_`` fields
      set: it could result in incorrect analyses and
      map2nifti-produced NIfTI files.  Now input files account for
      scaling/offset if ``scl_`` fields direct to do so. Moreover upon
      map2nifti, those fields get reset.
    - :file:`doc/examples/searchlight_minimal.py` - best error is the
      minimal one

  * Enhancements

    - :class:`~mvpa.clfs.gnb.GNB` can now tolerate training datasets
      with a single label
    - :class:`~mvpa.clfs.meta.TreeClassifier` can have trailing nodes
      with no classifier assigned

* 0.4.6 (Tue, Feb 01 2011) (Total: 20 commits)

  A bugfix release

  * Fixed (few BF commits):

    - Compatibility with numpy 1.5.1 (histogram) and scipy 0.8.0
      (workaround for a regression in legendre)
    - Compatibility with libsvm 3.0
    - :class:`~mvpa.clfs.plr.PLR` robustification

  * Enhancements

    - Enforce suppression of numpy warnings while running unittests.
      Also setting verbosity >= 3 enables all warnings (Python, NumPy,
      and PyMVPA)
    - :file:`doc/examples/nested_cv.py` example (adopted from 0.5)
    - Introduced base class :class:`~mvpa.clfs.base.LearnerError` for
      classifiers' exceptions (adopted from 0.5)
    - Adjusted example data to live upto nibabel's warranty of NIfTI
      standard-compliance
    - More robust operation of MC iterations -- skip iterations where
      classifier experienced difficulties and raise an exception
      (e.g. due to degenerate data)

* 0.4.5 (Fri, Oct 01 2010) (Total: 27 commits)

  A bugfix release

  * Fixed (13 BF commits):

    - Compatible with LIBSVM >= 2.91 (Closes: #583018)
    - No string exceptions raised (Python 2.6 compatibility)
    - Setting of shrinking parameter in :mod:`~mvpa.clfs.sg` interface
    - Deducing number of SVs for SVR (LIBSVM)
    - Correction of significance in the tails of non-parametric
      tests

  * Miscellaneous:

    - Development repository moved to http://github.com/PyMVPA/PyMVPA

* 0.4.4 (Mon, Feb 2 2010) (Total: 144 commits)

  Primarily a bugfix release, probably the last in 0.4 series since
  development for 0.5 release is leaping forward.

  * New functionality (19 NF commits):

    - :class:`~mvpa.clfs.gnb.GNB` implements Gaussian Naïve Bayes
      Classifier.
    - :func:`~mvpa.misc.fsl.base.read_fsl_design` to read FSL FEAT design.fsf
      files (Contributed by Russell A. Poldrack).
    - :class:`~mvpa.datasets.miscfx.SequenceStats` to provide basic
      statistics on labels sequence (counter-balancing,
      autocorrelation).
    - New exceptions :class:`~mvpa.clfs.base.DegenerateInputError` and
      :class:`~mvpa.clfs.base.FailedToTrainError` to be thrown by
      classifiers primarily during training/testing.
    - Debug target `STATMC` to report on progress of Monte-Carlo
      sampling (during permutation testing).

  * Refactored (15 RF commits):

    - To get users prepared to 0.5 release, internally and in some
      examples/documentation, access to states and
      parameters is done via corresponding collections, not from the
      top level object (e.g. `clf.states.predictions` instead of
      soon-to-be-deprecated `clf.predictions`).  That should lead also
      to improved performance.
    - Adopted copy.py from python2.6 (support Ellipsis as well).

  * Fixed (38 BF commits):

    - GLM output does not depend on the enabled states any more.
    - Variety of docstrings fixed and/or improved.
    - Do not derive NaN scaling for SVM's C whenever data is
      degenerate (lead to never finishing SVM training).
    - :mod:`~mvpa.clfs.sg` :

      + KRR is optional now -- avoids crashing if KRR is not available.
      + tolerance to absent `set_precompute_matrix` in svmlight in
        recent shogun versions.
      + support for recent (present in 0.9.1) API change in exposing
        debug levels.

    - Python 2.4 compatibility issues: :class:`~mvpa.clfs.knn.kNN` and
      :class:`~mvpa.featsel.ifs.IFS`


* 0.4.3 (Sat, 5 Sep 2009) (Total: 165 commits)

  * Online documentation editor is no longer available due to low
    demand -- please submit changes via email.

  * Performance (Contributed by Valentin Haenel) (3 OPT commits):

    - Further optimized LIBSVM bindings.
    - Copy-if-sorted in
      :class:`~mvpa.datasets.base.Dataset.selectFeatures`.

  * New functionality (25 NF commits):

    - :class:`~mvpa.mappers.procrustean.ProcrusteanMapper` with
      orthogonal and oblique transformations.
    - Ability to generate simple reports using :mod:`reportlab`.
      See/run :file:`examples/match_distribution.py` for example.
    - :class:`~mvpa.clfs.meta.TreeClassifier` -- construct simple
      hierarchies of classifiers.
    - :func:`~mvpa.base.info.wtf` to report information about the
      system/PyMVPA to be included in the bug reports.
    - Parameter 'reverse' to swap training/testing splits in
      :class:`~mvpa.datasets.splitters.Splitter` .
    - Example code for the analysis of event-related dataset using
      :class:`~mvpa.datasets.nifti.ERNiftiDataset`.
    - :meth:`~mvpa.misc.io.base.SampleAttributes.toEvents` to create
      lists of :class:`~mvpa.misc.support.Event`.
    - :file:`mvpa-prep-fmri` was extended with plotting of motion
      correction parameters.
    - :class:`~mvpa.misc.io.base.ColumnData` can be explicitly told
      either file contains a header.
    - In :class:`~mvpa.atlases.base.XMLBasedAtlas`
      (e.g. :mod:`~mvpa.atlases.fsl` atlases) it is now possible to
      provide custom 'image_file' to get maps or
      indexes for the areas given an atlas's volume registered into
      subject space.
    - Updated included LIBSVM version to 2.89 and provided support for
      its "silencing".

  * Refactored (27 RF commits):

    - Dataset's :meth:`~mvpa.datasets.base.Dataset.copy` with
      deep=False allows for shallow copying the dataset.
    - :class:`~mvpa.clfs.meta.FeatureSelectionClassifier` s in
      :mod:`~mvpa.clfs.warehouse` not to reuse the same classifiers,
      but to use clones.

  * Fixed (70 BF commits):

    - :class:`~mvpa.measures.anova.OneWayAnova`: previously degrees of
      freedom were not considered while computing F-scores.
    - Majority voting strategy in :class:`~mvpa.clfs.knn.kNN`: it was
      not working.
    - Various fixes to ensure cross-platform building (:mod:`numpy` header
      locations, etc).
    - Stability fixes in :class:`~mvpa.clfs.transerror.ConfusionMatrix`.
    - :meth:`~mvpa.datasets.base.Dataset.idsonboundaries`: samples
      at the end of the sequence were not handled properly.
    - Proper "untraining" of
      :class:`~mvpa.clfs.meta.FeatureSelectionClassifier` s
      classifiers which use sensitivities: it could lead to various
      unpleasant side-effects if the same slave classifier was used
      simultaneously by multiple :class:`MetaClassifiers` (like
      :class:`~mvpa.clfs.meta.TreeClassifier`).

  * Documentation (25 DOC commits): citations, spelling corrections,
    etc.


* 0.4.2 (Mon, 25 May 2009)

  * New correlation stability measure
    (:class:`~mvpa.measures.corrstability.CorrStability`).
  * New elastic net classifier (:class:`~mvpa.clfs.enet.ENET`).
  * New GLM-Net regression/classifier (:class:`~mvpa.clfs.glmnet.GLMNET`).
  * New measure :class:`~mvpa.measures.anova.CompoundOneWayAnova`.
  * New measure :class:`~mvpa.measures.ds.DSMDatasetMeasure`.
  * New meta-measure
    :class:`~mvpa.measures.splitmeasure.TScoredFeaturewiseMeasure`.
  * New basic :class:`~mvpa.measures.glm.GLM` implementation.
  * New examples for Gaussian process regression.
  * New example showing a searchlight analysis employing a dissimilarity
    matrix based measure.
  * New :class:`~mvpa.mappers.zscore.ZScoreMapper`.
  * New import helper for FSL design matrices
    (:class:`~mvpa.misc.fsl.base.FslGLMDesign`).
  * New implementation of a mapper using a self-organizing map
    (:class:`~mvpa.mappers.som.SimpleSOMMapper`) and a corresponding example.
  * Matplotlib backend is now configurable via
    :envvar:`MVPA_MATPLOTLIB_BACKEND`.
  * PyMVPA version is now avialable from :data:`mvpa.__version__`.
  * Renamed `mvpa.misc.plot.errLinePLot` to
    :func:`~mvpa.misc.plot.plotErrLine` for consistency.
  * Fixed :class:`~mvpa.datasets.splitters.NFoldSplitter` to support N-3 and
    larger splits.
  * Improved speed of LIBSVM backend. Thanks to Valentin Haenel and Tiziano
    Zito.
  * Updated included LIBSVM version to 2.89.
  * Adjust LIBSVM Python interface for recent NumPy API and latest LIBSVM
    release 2.89.
  * Refactored examples parser into a standalone tool to turn PyMVPA examples
    into restructured text sources.

* 0.4.1 (Sat, 24 Jan 2009)

  * Unit tests and example data are now also installed. In conjunction with
    :func:`mvpa.test`, this allow to easily run unittests from within Python.
  * :class:`~mvpa.datasets.nifti.NiftiDataset` capable to handle files
    with less than 4 dimensions, which can, optionally, be provided as
    a list of filenames or :class:`~nifti.NiftiImage` objects. That
    makes it easy to load data from a sequence of files.

  * Changes (code refactorings) which *might impact* any user who
    imports from :mod:`~mvpa.suite`:

    - Pre-populated warehouses of classifiers and regressions are
      renamed from clfs and regrs into
      :data:`~mvpa.clfs.warehouse.clfswh` and
      :data:`~mvpa.clfs.warehouse.regrswh` respectively.
    - :class:`~mvpa.misc.io.hamster.Hamster` is not derived from
      :class:`dict` any longer -- just from a basic :class:`object` class.
      API includes methods 'dump', 'asdict' and a property 'registered'.

  * Changes (code refactorings) which *should not impact* any user who
    imports from :mod:`~mvpa.suite`:

    - Meta classifiers definitions moved from :mod:`~mvpa.clfs.base` into
      :mod:`~mvpa.clfs.meta`.
    - Splitters definitions moved from :mod:`~mvpa.datasets.splitter` into
      :mod:`~mvpa.datasets.splitters`


* 0.4.0 (Sat, 15 Nov 2008)

  * Add :class:`~mvpa.misc.io.hamster.Hamster`, as a simple facility to easily
    store any serializable objects in a compressed file and later on resurrect
    all of them with a single line of code.
  * SVM backend is now configurable via :envvar:`MVPA_SVM_BACKEND` (libsvm or
    shogun).
  * Non-deterministic tests in the unittest battery are now configurable via
    :envvar:`MVPA_TESTS_LABILE`.
  * New helper to determine and plot the best matching distribution(s) for
    the data (matchDistribution, plotDistributionMatches). It is WiP
    thus API can change in the upcoming release.
  * Simplifies API of mappers.
  * Splitters can now limit the number of splits automatically.
  * New :class:`~mvpa.mappers.base.CombinedMapper` to map between multiple,
    independent dataspace and a common feature space.
  * New :class:`~mvpa.mappers.base.ChainMapper` to create chains of mappers
    of abitrary lenght (e.g. to build preprocessing pipelines).
  * New :class:`~mvpa.datasets.event.EventDataset` to rapidly extract
    boxcar-shaped samples from data array using a simple list of
    :class:`~mvpa.misc.support.Event` definitions.
  * Removed obsolete MetricMapper class. :class:`~mvpa.mappers.base.Mapper`
    itself provides the facilities for dealing with metrics.
  * :class:`~mvpa.mappers.boxcar.BoxcarMapper` can now handle data with more
    than four dimensions/axis and also performs reverse mapping of single
    boxcar samples.
  * :class:`~mvpa.misc.fsl.base.FslEV3` can now convert EV3 files into
    a list of :class:`~mvpa.misc.support.Event` instances.
  * Results of tests for external dependencies are now stored in PyMVPA's
    config manager (`mvpa.cfg`) and can be stored to a file (not done
    automatically at the moment). This will significantly decrease the time
    needed to import the `mvpa` module, as it prevents the repeated and lengthy
    tests for working externals.
  * Initial support for ROC computing and AUC as an accuracy measure.
  * Weights of LARS are now available via :class:`~mvpa.clfs.lars.LARSWeights`.
  * Added an initial list of MVPA-related references to the manual, tagged with
    keywords and comments as well is DOI or similar URL reference to the
    original document.
  * Added initial glossary to the manual.
  * New 'Module reference', as a middle-ground between manual and API
    reference.
  * New manual section about meta-classifiers (contributed by James M.
    Hughes).
  * New minimal example for a 'getting started' section in the manual.
  * Former :envvar:`MVPA_QUICKTEST` was renamed to :envvar:`MVPA_TESTS_QUICK`.
  * Update installation instructions for RPM-based distributions to make use
    of the OpenSUSE Build Service.
  * Updated install instructions for several RPM-based GNU/Linux
    distributions.
  * Switch from distutils to numpy.distutils (no change in dependencies).
  * Depend on PyNIfTI >= 0.20081017.1 and gain a smaller memory footprint when
    accessing NIfTI files via all datasets with NIfTI support.
  * Added workaround to make PyMVPA work with older Shogun releases and those
    from 0.6.4 on, which introduced backward-incompatible API changes.


* 0.3.1 (Sun, 14 Sep 2008)

  * New manual section about feature selection with a focus on RFE.
    Contributed by James M. Hughes.
  * New dataset type :class:`~mvpa.datasets.channel.ChannelDataset` for data
    structured in channels. Might be useful for data modalities like EEG and
    MEG. This dataset includes support for common preprocessing steps like
    resampling and baseline signal substraction.
  * Plotting of topographies on heads. Thanks to Ingo Fründ for contributing
    this code. Additionally, a new example shows how to do such plots.
  * New general purpose function for generating barplots and candlestick plots
    with error bars (:func:`~mvpa.misc.plot.base.plotBars`).
  * Dataset supports mapping of string labels onto numerical labels, removing
    the need to perform this mapping manually in user code. 'clfs_examples.py'
    is adjusted accordingly to demonstrate the new feature.
  * New :meth:`mvpa.clfs.base.Classifier.summary` method to dump classifier
    settings.
  * Improved and more flexible :func:`~mvpa.misc.plot.erp.plotERPs`.
  * New :class:`~mvpa.measures.irelief.IterativeRelief` sensitivity analyzer.
  * Added visualization of confusion matrices via
    :meth:`mvpa.clfs.transerror.ConfusionMatrix.plot` inspired by Ingo Fründ.
  * The PyMVPA version is now globally available in :data:`mvpa.pymvpa_version`.
  * BugFix: :class:`~mvpa.misc.io.meg.TuebingenMEG` reader failed in some cases.
  * Several improvements (docs and implementation) for building PyMVPA on
    MacOS X.
  * New convenience accessor methods (:meth:`~mvpa.datasets.base.Dataset.select`,
    :meth:`~mvpa.datasets.base.Dataset.where` and
    :meth:`~mvpa.datasets.base.Dataset.__getitem__`) for
    :class`~mvpa.datasets.base.Dataset`.
  * New :func:`mvpa.seed()` function to configure the random number generators
    from user code.
  * Added reader for a MEG sensor locations format
    (:class:`~mvpa.misc.io.meg.TuebingenMEGSensorLocations`).
  * Initial model selection support for GRP (using openopt).
  * And tons of minor bugfixes, additional tests and improved documentation.


* 0.3.0 (Mon, 18 Aug 2008)

  * Import of binary EEP files (used by EEProbe) and EEPDataset class.
  * Initial version of a meta dataset class (MetaDataset). This is a container
    for multiple datasets, which behaves like a dataset itself.
  * Regression performance is summarized now within RegressionStatistics.
  * Error functions: CorrErrorPFx, RelativeRMSErrorFx.
  * Measures: CorrCoef.
  * Data generators: chirp, wr1996
  * Few more examples: curvefitting, kerneldemo, smellit, projections
  * Updated kNN classifier. kNN is now able to use custom distance function
    to determine that nearest neighbors. It also (re)gained the ability to do
    simple majority or weighted voting.
  * Some initial convenience functions for plotting typical results and data
    exploration.
  * Unified configuration handling with support for user-specific and
    analysis-specific config files, as well as the ability to override all
    config settings via environment variables. The configuration handling is
    used for PyMVPA internal settings, but can also be easily used for
    custom (user-)settings.
  * Improved modularity, e.g. SciPy is not required anymore, but still very
    useful.
  * Initial implementations of ICA and PCA mapper using functionality provided
    by MDP. These mappers are more or less untested and should be used with
    great care.
  * Further improved docstrings of some classes, but still a long way to go.
  * New 'boxcar' mapper, which is the similar to the already present
    transformWithBoxCar() function, but implemented as a mapper.
  * New SampleGroupMapper that can be used for e.g. block averaging of
    samples. See new FAQ item.
  * Stripped redundant suffixes from module names, e.g.
    mvpa.datasets.niftidataset -> mvpa.datasets.nifti
  * mvpa.misc.cmdline variables opt* and opts* were groupped within
    opt and optss class instances. Also names of the options were
    changed to match 'dest' of the options. Use tools/refactor.py to
    quickly fix your custom code.
  * Change all references to PyMVPA website to www.pymvpa.org.
  * Make website stylesheet compatible with sphinx 0.4.
  * Several minor improvements of the compatibility with MacOS.
  * Extended FAQ section of the manual.
  * Bugfix: double_gamma_hrf() ignoring K2 argument.


* 0.2.2 (Tue, 17 Jun 2008)

  * Extended build instructions: Added section on OpenSUSE.
  * Replaced ugly PYMVPA_LIBSVM environment variable to trigger compiling the
    LIBSVM wrapper with a proper '--with-libsvm' switch in setup.py.
    Additionally, setup.py now detects if included LIBSVM has been built and
    enables LIBSVM wrapper automatically in this case.
  * Added proper Makefiles for LIBSVM copy, with configurable compiler flags.
  * Added 'setup.cfg' to remove the need to manually specify swig-opts
    (Windows specific configuration is in 'setup.cfg.win').


* 0.2.1 (Sun, 15 Jun 2008)

  * Several improvements to make building PyMVPA on Windows systems easy
    (e.g. added dedicated Makefile.win to build a binary installer).
  * Improved and extended documentation for building and installing PyMVPA.
  * Include a minimal copy of the required (patched) LIBSVM library (currently
    version 2.85.0) for convenience. This copy is automatically compiled and
    used for the LIBSVM wrapper when PyMVPA built using the `Make` approach.


* 0.2.0 (Wed, 29 May 2008)

  * New Splitter class (HalfSplitter) to split into first and second half.
  * New Splitter class (CustomSplitter) to allow for splits with an arbitrary
    number of datasets per split and the ability to specify the association
    of samples with any of those datasets (not just the validation set).
  * New sparse multinomial logistic regression (SMLR) classifier and
    associated sensitivity analyzer.
  * New least angle regression classifier (LARS).
  * New Gaussian process regression classifier (GPR).
  * Initial documentation on extending PyMVPA.
  * Switch to Sphinx for documentation handling.
  * New example comparing the performance of all classifiers on some
    artificial datasets.
  * New data mapper performing singular value decomposition (SVDMapper) and an
    example showing its usage.
  * More sophisticated data preprocessing: removal of non-linear trends and
    other arbitrary confounding regressors.
  * New `Harvester` class to feed data from arbitrary generators into multiple
    objects and store results of returned values and arbitrary properties.
  * Added documentation about how to build patched libsvm version with sane
    debug output.
  * libsvm bindings are not build by default anymore. Instructions on how to
    reenable them are available in the manual.
  * New wrapper from SVM implementation of the Shogun toolbox.
  * Important bugfix in RFE, which reported incorrect feature ids in some
    cases.
  * Added ability to compute stats/probabilities for all measures and transfer
    errors.


* 0.1.0 (Wed, 20 Feb 2008)

  * First public release.

.. _statsmodels: http://statsmodels.sourceforge.net