Examples

import numpy as np
import pandas as pd

def histogram_intersection(p, q):
    v = np.minimum(p, q).sum().round(decimals=1)
    return v

s1 = pd.Series([.1, .0, .5, .1])

s2 = pd.Series([.2, .3, .0, .2])

s1.corr(s2, method=histogram_intersection)

0.2