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pandas.Series.idxmin — pandas 2.3.1 documentation

Series.idxmin(axis=0, skipna=True, *args, **kwargs)[source]#

Return the row label of the minimum value.

If multiple values equal the minimum, the first row label with that value is returned.

Parameters:

axis{0 or ‘index’}

Unused. Parameter needed for compatibility with DataFrame.

skipnabool, default True

Exclude NA/null values. If the entire Series is NA, the result will be NA.

*args, **kwargs

Additional arguments and keywords have no effect but might be accepted for compatibility with NumPy.

Returns:

Index

Label of the minimum value.

Raises:

ValueError

If the Series is empty.

See also

numpy.argmin

Return indices of the minimum values along the given axis.

DataFrame.idxmin

Return index of first occurrence of minimum over requested axis.

Series.idxmax

Return index label of the first occurrence of maximum of values.

Notes

This method is the Series version of ndarray.argmin. This method returns the label of the minimum, while ndarray.argmin returns the position. To get the position, use series.values.argmin().

Examples

>>> s = pd.Series(data=[1, None, 4, 1],
...               index=['A', 'B', 'C', 'D'])
>>> s
A    1.0
B    NaN
C    4.0
D    1.0
dtype: float64

If skipna is False and there is an NA value in the data, the function returns nan.

>>> s.idxmin(skipna=False)
nan

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