pandas.Index.argmax

Index.argmax(axis=None, skipna=True, *args, **kwargs)

Return int position of the largest value in the Index.

If the maximum is achieved in multiple locations, the first row position is returned.

Parameters:

axisNone

Unused. Parameter needed for compatibility with DataFrame.

skipnabool, default True

Exclude NA/null values. If the entire Series is NA, or if skipna=False and there is an NA value, this method will raise a ValueError.

*args, **kwargs

Additional arguments and keywords for compatibility with NumPy.

Returns:

int

Row position of the maximum value.

See also

Series.argmax

Return position of the maximum value.

Series.argmin

Return position of the minimum value.

numpy.ndarray.argmax

Equivalent method for numpy arrays.

Series.idxmax

Return index label of the maximum values.

Series.idxmin

Return index label of the minimum values.

Examples

Consider dataset containing cereal calories

>>> idx = pd.Index([100.0, 110.0, 120.0, 110.0])
>>> idx
Index([100.0, 110.0, 120.0, 110.0], dtype='float64')

>>> idx.argmax()
np.int64(2)
>>> idx.argmin()
np.int64(0)

The maximum cereal calories is the third element and the minimum cereal calories is the first element, since index is zero-indexed.