import pandas as pd
import matplotlib.pyplot as pl

data = pd.read_csv('calcs/hubbard/itcf.out', sep=r'\s+', comment='#')
pl.errorbar(data.tau, data.G_greater_spin_up_00,
            yerr=data.G_greater_spin_up_00_err, fmt='o')
pl.xlabel(r'$\tau t$')
pl.ylabel(r'$G_{00}^{\uparrow\uparrow}(\tau)$')