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.. _whatsnew_0801:
Version 0.8.1 (July 22, 2012)
-----------------------------
{{ header }}
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
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