wesm/pandas — pull request #362 by changhiskhan (2011-11-13 15:45:22+00:00)
Title: Issues #194 (cov function) and #92 (multi-column sort)

Added:

1. Series.cov
2. DataFrame.cov
3. test_cov in test_series.py
4. test_cov in test_frame.py

Modified:

1. DataFrame.sort
2. DataFrame.sort_index
3. test_sort in test_frame.py