Version 0.6.1 (December 13, 2011)#
Can append single rows (as Series) to a DataFrame
Add Spearman and Kendall rank correlation options to Series.corr and DataFrame.corr (GH428)
set_valuemethods to Series, DataFrame, and Panel for very low-overhead access (>2x faster in many cases) to scalar elements (GH437, GH438).
set_valueis capable of producing an enlarged object.
Add PyQt table widget to sandbox (GH435)
Implement fast data ranking for Series and DataFrame, fast versions of scipy.stats.rankdata (GH428)
DataFrame.from_itemsalternate constructor (GH444)
Can pass DataFrame/DataFrame and DataFrame/Series to rolling_corr/rolling_cov (GH #462)
MultiIndex.get_level_values can accept the level name
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)
A total of 7 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.
Fernando Perez +
Jev Kuznetsov +
Ralph Bean +