DOC: Clarify groupby operates on axis 0 and remove 'selected axis' re… #62853
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…ference This commit addresses issue pandas-dev#56397 by removing outdated references to "the selected axis" in groupby documentation and clarifying that: 1. DataFrame.groupby() always operates along axis 0 (rows) 2. The axis parameter was removed in pandas 3.0 3. To group by columns, users must transpose the DataFrame first Changes: - Updated API reference docstring in DataFrame.groupby() to replace "selected axis" with "number of rows" - Enhanced user guide to explicitly state groupby operates on axis 0 - Added note explaining the removal of the axis parameter and the need to use .T for column-wise grouping Fixes pandas-dev#56397
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…ference
This commit addresses issue #56397 by removing outdated references to "the selected axis" in groupby documentation and clarifying that:
Changes:
Fixes #56397
doc/source/whatsnew/vX.X.X.rstfile if fixing a bug or adding a new feature.