v0.4.0rc1

This is the release notes of v0.4.0rc1. See here for the complete list of solved issues and merged PRs.

New Features

• DataFrame
  • Add support for isna, notna and __dir__ (#1125)
  • Add support for md.dropna (#1129)
  • Support groupby.__getitem__ and group by level (#1136)
  • Implement DataFrame nunique (#1137)
  • Implements md.cut (#1139)
  • Add plot and relative functions for DataFrame and Series (#1143)
  • Implements {DataFrame, Series}.{shift, tshift} (#1157)
  • Add support of md.expanding (#1160)
  • Implements {DataFrame,Series}.diff (#1174)
  • Support modulo operand for DataFrame (#1176)
  • Add Series.value_counts() support (#1181)
• Tensor
  • Add support for mt.union1d (#1147)
  • Support Tensor.__setitem__ with bool indexing (#1159)
• Learn
  • Add support for NearestNeighbors.kneighbors_graph (#1152)
  • Add support for mars.learn.metrics.accuracy_score (#1150)
  • Implements mars.learn.metrics.pairwise.rbf_kernel (#1158)
  • Implements mars.learn.semi_supervised.LabelPropagation (#1163)

Enhancements

• Refactor GroupBy objects (#1127)

Bug fixes

• Support md.merge when on column is in df.index (#1132)
• Fix tokenizing partial function (#1149)
• Allow retrieving shape of a groupby object (#1155)

Documentation

• Add DataFrame docs (#1130)
• Fix requirements for doc (#1135)
• Fix rendering numpy-style documentations (#1179)
• Fix some mistakes in the doc. (#1161, thanks @ueshin!)

Tests

• Check if tileable.nsplits and chunk.shape is consistent (#1108)
• Add meta checks for groupby (#1144)
• Allow using pyarrow==0.17.0 (#1172)