pandas.core.groupby.DataFrameGroupBy.idxmin¶

DataFrameGroupBy.idxmin(axis=0, skipna=True, numeric_only=_NoDefault.no_default)[source]¶

Return index of first occurrence of minimum over requested axis.

NA/null values are excluded.

Parameters:

axis{0 or ‘index’, 1 or ‘columns’}, default 0: The axis to use. 0 or ‘index’ for row-wise, 1 or ‘columns’ for column-wise.
skipnabool, default True: Exclude NA/null values. If an entire row/column is NA, the result will be NA.
numeric_onlybool, default True for axis=0, False for axis=1: Include only float, int or boolean data.

New in version 1.5.0.

Returns:

Series: Indexes of minima along the specified axis.

Raises:

ValueError

If the row/column is empty

See also

Series.idxmin: Return index of the minimum element.

Notes

This method is the DataFrame version of ndarray.argmin.

Examples

Consider a dataset containing food consumption in Argentina.

>>> df = pd.DataFrame({'consumption': [10.51, 103.11, 55.48],
...                    'co2_emissions': [37.2, 19.66, 1712]},
...                    index=['Pork', 'Wheat Products', 'Beef'])

>>> df
                consumption  co2_emissions
Pork                  10.51         37.20
Wheat Products       103.11         19.66
Beef                  55.48       1712.00

By default, it returns the index for the minimum value in each column.

>>> df.idxmin()
consumption                Pork
co2_emissions    Wheat Products
dtype: object

To return the index for the minimum value in each row, use axis="columns".

>>> df.idxmin(axis="columns")
Pork                consumption
Wheat Products    co2_emissions
Beef                consumption
dtype: object

pandas.core.groupby.DataFrameGroupBy.idxmax

pandas.core.groupby.DataFrameGroupBy.mad