How do I get the percentile for a row in a pandas dataframe?

Question

Example DataFrame Values -  

0     78
1     38
2     42
3     48
4     31
5     89
6     94
7    102
8    122
9    122  

stats.percentileofscore(temp[\'INCOME\'].v         


        

Answer 1

This seems to work:

A = np.sort(temp['INCOME'].values)
np.interp(sample, A, np.linspace(0, 1, len(A)))

For example:

>>> temp.INCOME.quantile(np.interp([37.5, 38, 122, 121], A, np.linspace(0, 1, len(A))))
0.103175     37.5
0.111111     38.0
1.000000    122.0
0.883333    121.0
Name: INCOME, dtype: float64

Please note that this strategy only makes sense if you want to query a large enough number of values. Otherwise the sorting is too expensive.