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Backport PR #48164 on branch 1.4.x (BUG/REGR: Fix subset for DataFrameGroupBy.value_counts) Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Groupby
ENH: Support mask in duplicated algorithm Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff duplicated duplicated, drop_duplicates NA - MaskedArrays Related to pd.NA and nullable extension arrays
ENH: Support mask in unique Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff NA - MaskedArrays Related to pd.NA and nullable extension arrays
Add test for unique aggregation returning different dtypes Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Dtype Conversions Unexpected or buggy dtype conversions Testing pandas testing functions or related to the test suite
PERF improve performance of is_lexsorted Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Performance Memory or execution speed performance
DEPR: na_sentinel in factorize Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Deprecate Functionality to remove in pandas Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
ENH: support mask in libalgos.rank Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff NA - MaskedArrays Related to pd.NA and nullable extension arrays
BUG: Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Bug Categorical Categorical Data Type Groupby
DataFrameGroupBy.value_counts includes non-observed categories of non-grouping columns Algos TST: Add a test for Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff metadata _metadata, .attrs Testing pandas testing functions or related to the test suite
series name should be preserved in pser.mode() Algos BUG: isin casting to float64 for unsigned int and list Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Bug Regression Functionality that used to work in a prior pandas version
Backport PR #46602 on branch 1.4.x (CI/TST: Make test_vector_resize more deterministic) Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Testing pandas testing functions or related to the test suite
BUG: MaskedArray._quantile match non-nullable behavior Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff NA - MaskedArrays Related to pd.NA and nullable extension arrays Stale
PERF: faster corrwith method for pearson and spearman correlation when other is a Series and axis = 0 (column-wise) Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Performance Memory or execution speed performance
PERF: avoid unnecessary copies factorize Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Performance Memory or execution speed performance
BUG: Change numeric_only default to True Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Deprecate Functionality to remove in pandas quantile quantile method
REF: use fused types for mode Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Refactor Internal refactoring of code
Backport PR #45646 on branch 1.4.x (Revert "PERF: nancorr pearson (#42761)") Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Regression Functionality that used to work in a prior pandas version
Revert "PERF: nancorr pearson (#42761)" Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Regression Functionality that used to work in a prior pandas version
BUG: SeriesGroupBy.value_counts - index name missing in categorical columns Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Bug Categorical Categorical Data Type Groupby Series Series data structure
REF: standardize __array_ufunc__ patterns Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Refactor Internal refactoring of code
DEPR/ENH: support axis=None in min/max Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Deprecate Functionality to remove in pandas
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