This is a major release that includes a number of new features and bug fixes, including several changes from existing behavior.
- Automatic alignment of index labels in arithmetic and when combining arrays or datasets.
- Aggregations like mean now skip missing values by default.
- Relaxed equality rules in concat and merge for variables with equal value(s) but different shapes.
dropmethod for dropping variables or index labels.
- Support for reindexing with a fill method like pandas.
For more details, see the release notes.