.. _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 ` accessible via Series.str (:issue:`620`) - Add option to disable adjustment in EWMA (:issue:`1584`) - :ref:`Radviz plot ` (:issue:`1566`) - :ref:`Parallel coordinates plot ` - :ref:`Bootstrap plot ` - 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 ` 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 .. _whatsnew_0.8.1.contributors: Contributors ~~~~~~~~~~~~ .. contributors:: v0.8.0..v0.8.1