v0.8.1.rst

v0.8.1 (July 22, 2012)

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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 !)
• 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

Contributors

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