#!/usr/bin/env python

import matplotlib.pyplot as plt
import numpy             as np
import sys


table = np.loadtxt(sys.stdin, unpack=True, skiprows=2, delimiter='|')
calls, I_MC, σ_MC, I_MI, σ_MI, I_VE, σ_VE, chi = table
exact = 1.7182818285

plt.figure()
# plt.figure(figsize=(5, 3))
# plt.rcParams['font.size'] = 8

plt.title('Integral uncertainty', loc='right')
plt.ylabel('$\sigma_I$')
plt.xlabel('calls')
plt.xscale('log')
plt.yscale('log')

plt.plot(calls, σ_MC, linestyle='', marker='o',
         color='#92182b', label='$\sigma_I$')
x = np.logspace(1, 8, 5)
a = 0.48734
b = -0.49938
plt.plot(x, a*(x**b), color='gray')

plt.tight_layout()
# plt.savefig('notes/images/5-fit.pdf')
plt.show()