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groupby multiple variables should include observed groups only

plan to closeMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

topic-groupby

usage question

Status: Open.

#11178 In pydata/xarray;

· joshua-gould opened on Feb 17, 2026

fix: Improve error message for non-existent dimension in groupby reduce (Fixes #10875)

topic-groupby

Status: Open (in progress).

pydata/xarraynumber 11023

#11023 In pydata/xarray;

· samay2504 opened on Dec 16, 2025

Use cumsum from flox

plan to mergeFinal call for commentsFinal call for comments

run-benchmarkRun the ASV benchmark workflowRun the ASV benchmark workflow

topic-DataTreeRelated to the implementation of a DataTree classRelated to the implementation of a DataTree class

topic-groupby

topic-performance

Status: Open (in progress).

pydata/xarraynumber 10987

#10987 In pydata/xarray;

· Illviljan opened on Dec 6, 2025

Confusing error message when reducing over non-existent dimension

bug

topic-error reporting

topic-groupby

Status: Open.

#10875 In pydata/xarray;

· mousey92 opened on Oct 24, 2025

Support <code>drop_incomplete</code> kwarg with <code>SeasonGrouper</code>

contrib-help-wanted

enhancement

topic-groupby

Status: Open.

#10426 In pydata/xarray;

· dcherian opened on Jun 17, 2025

enforced return types of groupby sequence arguments

topic-groupby

Status: Open (in progress).

pydata/xarraynumber 10271

#10271 In pydata/xarray;

· zerothi opened on Apr 29, 2025

Data*.groupby with sequences yields scalars for len-1 sequences

bug

topic-groupby

Status: Open.

#10246 In pydata/xarray;

· zerothi opened on Apr 24, 2025

Tracking internal uses of concat that don't allow setting all the kwargs

topic-combinecombine/concat/mergecombine/concat/merge

topic-groupby

topic-internals

Status: Open.

#10095 In pydata/xarray;

· jsignell opened on Mar 4, 2025

Use DatasetGroupBy.quantile for DatasetGroupBy.median for multiple groups when using dask arrays

topic-groupby

upstream issue

Status: Open.

#9935 In pydata/xarray;

· adriaat opened on Jan 9, 2025

Weighting a datatree by a tree of dataarrays

API design

topic-DataTreeRelated to the implementation of a DataTree classRelated to the implementation of a DataTree class

topic-groupby

Status: Open.

#9595 In pydata/xarray;

· TomNicholas opened on Oct 8, 2024

Using the shuffle primitive in Xarray

API design

enhancement

topic-groupby

Status: Open.

#9546 In pydata/xarray;

· dcherian opened on Sep 25, 2024

Feature: Aggregate using one or more operations over the specified axis.

enhancement

topic-groupby

Status: Open.

#9479 In pydata/xarray;

· kobebryant432 opened on Sep 11, 2024