Version 0.8.1 (July 22, 2012)

.. _whatsnew_0801:

This release includes a few new features, performance enhancements, and over 30 bug fixes from 0.8.0. New features include notably NA friendly string processing functionality and a series of new plot types and options.

New features


  - Add :ref:`vectorized string processing methods <text.string_methods>`
    accessible via Series.str (:issue:`620`)
  - Add option to disable adjustment in EWMA (:issue:`1584`)
  - :ref:`Radviz plot <visualization.radviz>` (:issue:`1566`)
  - :ref:`Parallel coordinates plot <visualization.parallel_coordinates>`
  - :ref:`Bootstrap plot <visualization.bootstrap>`
  - Per column styles and secondary y-axis plotting (:issue:`1559`)
  - New datetime converters millisecond plotting  (:issue:`1599`)
  - Add option to disable "sparse" display of hierarchical indexes (:issue:`1538`)
  - Series/DataFrame's ``set_index`` method can :ref:`append levels
    <indexing.set_index>` to an existing Index/MultiIndex (:issue:`1569`, :issue:`1577`)

Performance improvements

Improved implementation of rolling min and max (thanks to Bottleneck <https://bottleneck.readthedocs.io>__ !)
Add accelerated 'median' GroupBy option (:issue:1358)
Significantly improve the performance of parsing ISO8601-format date strings with DatetimeIndex or to_datetime (:issue:1571)
Improve the performance of GroupBy on single-key aggregations and use with Categorical types
Significant datetime parsing performance improvements

.. _whatsnew_0.8.1.contributors:

Contributors


.. contributors:: v0.8.0..v0.8.1