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.. _whatsnew_061:
Version 0.6.1 (December 13, 2011)
---------------------------------
New features
~~~~~~~~~~~~
- Can append single rows (as Series) to a DataFrame
- Add Spearman and Kendall rank correlation
options to Series.corr and DataFrame.corr (:issue:`428`)
- :ref:`Added <indexing.basics.get_value>` ``get_value`` and ``set_value`` methods to
Series, DataFrame, and Panel for very low-overhead access (>2x faster in many
cases) to scalar elements (:issue:`437`, :issue:`438`). ``set_value`` is capable of
producing an enlarged object.
- Add PyQt table widget to sandbox (:issue:`435`)
- DataFrame.align can :ref:`accept Series arguments <basics.align.frame.series>`
and an :ref:`axis option <basics.df_join>` (:issue:`461`)
- Implement new :ref:`SparseArray <sparse.array>` and ``SparseList``
data structures. SparseSeries now derives from SparseArray (:issue:`463`)
- :ref:`Better console printing options <basics.console_output>` (:issue:`453`)
- Implement fast data ranking for Series and
DataFrame, fast versions of scipy.stats.rankdata (:issue:`428`)
- Implement ``DataFrame.from_items`` alternate
constructor (:issue:`444`)
- DataFrame.convert_objects method for :ref:`inferring better dtypes <basics.cast>`
for object columns (:issue:`302`)
- Add :ref:`rolling_corr_pairwise <window.corr_pairwise>` function for
computing Panel of correlation matrices (:issue:`189`)
- Add :ref:`margins <reshaping.pivot.margins>` option to :ref:`pivot_table
<reshaping.pivot>` for computing subgroup aggregates (:issue:`114`)
- Add ``Series.from_csv`` function (:issue:`482`)
- :ref:`Can pass <window.cov_corr>` DataFrame/DataFrame and
DataFrame/Series to rolling_corr/rolling_cov (GH #462)
- MultiIndex.get_level_values can :ref:`accept the level name <advanced.get_level_values>`
Performance improvements
~~~~~~~~~~~~~~~~~~~~~~~~
- Improve memory usage of ``DataFrame.describe`` (do not copy data
unnecessarily) (PR #425)
- Optimize scalar value lookups in the general case by 25% or more in Series
and DataFrame
- Fix performance regression in cross-sectional count in DataFrame, affecting
DataFrame.dropna speed
- Column deletion in DataFrame copies no data (computes views on blocks) (GH
#158)
.. _whatsnew_0.6.1.contributors:
Contributors
~~~~~~~~~~~~
.. contributors:: v0.6.0..v0.6.1
|
