pandas.core.window.expanding.Expanding.quantile

Expanding.quantile(q, interpolation='linear', numeric_only=False)

Calculate the expanding quantile.

Parameters:

qfloat

Quantile to compute. 0 <= quantile <= 1.

Deprecated since version 2.1.0: This was renamed from ‘quantile’ to ‘q’ in version 2.1.0.

interpolation{‘linear’, ‘lower’, ‘higher’, ‘midpoint’, ‘nearest’}

This optional parameter specifies the interpolation method to use, when the desired quantile lies between two data points i and j:

• linear: i + (j - i) * fraction, where fraction is the fractional part of the index surrounded by i and j.

• lower: i.

• higher: j.

• nearest: i or j whichever is nearest.

• midpoint: (i + j) / 2.

numeric_onlybool, default False

Include only float, int, boolean columns.

Added in version 1.5.0.

Returns:

Series or DataFrame

Return type is the same as the original object with np.float64 dtype.

See also

Series.expanding

Calling expanding with Series data.

DataFrame.expanding

Calling expanding with DataFrames.

Series.quantile

Aggregating quantile for Series.

DataFrame.quantile

Aggregating quantile for DataFrame.

Examples

>>> ser = pd.Series([1, 2, 3, 4, 5, 6], index=['a', 'b', 'c', 'd', 'e', 'f'])
>>> ser.expanding(min_periods=4).quantile(.25)
a     NaN
b     NaN
c     NaN
d    1.75
e    2.00
f    2.25
dtype: float64