#!/usr/bin/env python3
import matplotlib.pyplot as plt
import numpy as np
x, y = np.loadtxt('sqm_DX_001.dat', unpack = True)
plt.plot(x,y,'.', label = 'Dati con $DX = 1$')
x,y = np.loadtxt('sqm_DX_002.dat', unpack = True)
plt.plot(x,y, label = 'Dati con $DX = 2$')
x,y = np.loadtxt('sqm_DX_004.dat', unpack = True)
plt.plot(x,y, label = 'Dati con $DX = 4$')
x,y = np.loadtxt('sqm_DX_006.dat', unpack = True)
plt.plot(x,y, label = 'Dati con $DX = 6$')
x,y = np.loadtxt('sqm_DX_008.dat', unpack = True)
plt.plot(x,y, label = 'Dati con $DX = 8$')
x = np.arange(-100,100,1)
y = x*x
plt.plot(x,y, label ='DIO')
plt.legend(loc='upper left')
plt.grid()
plt.show()