#!/usr/bin/env python

from pylab import *
import sys

a, b, f = loadtxt(sys.stdin, unpack=True)
suptitle('Fraunhofer diffraction')
title(sys.argv[1] if len(sys.argv) > 1 else "", loc='right')
hist(a, np.insert(b, 0, a[0]), weights=f/sum(f),
     color='#dbbf0d', edgecolor='#595856', linewidth=0.5)
show()