Print OLS regression summary to text file

Question

I am running OLS regression using pandas.stats.api.ols using a groupby with the following code:

from pandas.stats.api import ols
df=pd.         


        

Answer 1

As of statsmodels 0.9, the Summary class supports export to multiple formats, including CSV and text:

import numpy as np
import statsmodels.api as sm
import statsmodels.formula.api as smf

dat = sm.datasets.get_rdataset("Guerry", "HistData").data
results = smf.ols('Lottery ~ Literacy + np.log(Pop1831)', data=dat).fit()

with open('summary.txt', 'w') as fh:
    fh.write(results.summary().as_text())

with open('summary.csv', 'w') as fh:
    fh.write(results.summary().as_csv())

The output of as_csv() is not machine-readable. Dumping results parameters with repr() would be.