import numpy as np
from matplotlib.pyplot import *

[liste_f,liste_G,liste_phi] = np.loadtxt('filtreLC-1.txt',unpack=True, skiprows=1)
GdB = 20*np.log10(liste_G)
liste_phi = np.unwrap(liste_phi)

figure(figsize=(8,8))
subplot(211)
plot(liste_f,GdB,'b-')
xscale('log')
grid()
ylabel('G (dB)')
subplot(212)
plot(liste_f,liste_phi,'b-')
xscale('log')
xlabel('f (Hz)')
ylabel('phi (rad)')
grid()
            

[liste_f,liste_G,liste_phi] = np.loadtxt('filtreLC-2.txt',unpack=True, skiprows=1)
GdB = 20*np.log10(liste_G)
liste_phi = np.unwrap(liste_phi)

figure(figsize=(8,8))
subplot(211)
plot(liste_f,GdB,'b-')
xscale('log')
grid()
ylabel('G (dB)')
subplot(212)
plot(liste_f,liste_phi,'b-')
xscale('log')
xlabel('f (Hz)')
ylabel('phi (rad)')
grid()