plots200.py

# -*- coding: utf-8 -*-
"""
Created on Tue Jun 12 11:55:12 2018

@author: janer
"""

import numpy as np
import matplotlib.pyplot as plt
from scipy import interpolate as itp


data = np.loadtxt('Werte200.txt')

f = data[:,0]
U0 = data[:,1]
Uc = data[:,2]
Ul = data[:,3]
Ua = data[:,4]
Ukr = data[:,5]
I = (Ua/200)*1000

f_new = np.linspace(f.min(),f.max(), 10000)
tckUc = itp.splrep(f, Uc, s=0)
tckUl = itp.splrep(f, Ul, s=0)
tckUa = itp.splrep(f, Ua, s=0)
tckUkr = itp.splrep(f, Ukr, s=0)
tckI = itp.splrep(f, I, s=0)
Uc_new = itp.splev(f_new, tckUc, der=0)
Ul_new = itp.splev(f_new, tckUl, der=0)
Ua_new = itp.splev(f_new, tckUa, der=0)
I_new = itp.splev(f_new, tckI, der=0)
Ukr_new = itp.splev(f_new, tckUkr, der=0)


plt.plot([488.678,488.678], [0.936,0], color ='red', linewidth=1.5, linestyle="--")
plt.text(488,0,'f0',size = 15, color = 'red')
plt.plot([419.063,419], [0.6874,0], color ='red', linewidth=1.5, linestyle="--")
plt.text(419,0,'f1',size = 15, color = 'red')
plt.plot([572.346,572.346], [0.6856,0], color ='red', linewidth=1.5, linestyle="--")
plt.text(572,0,'f2',size = 15, color = 'red')


plt.plot(f, Uc, 'b.')
plt.plot(f_new, Uc_new, 'b-', label = 'Uc')
plt.plot(f, Ul, 'g.')
plt.plot(f_new, Ul_new, 'g-', label = 'Ul')
plt.plot(f, Ua, 'y.')
plt.plot(f_new, Ua_new, 'y-', label = 'Ua')
plt.plot(f, Ukr, 'k.')
plt.plot(f_new, Ukr_new, 'k-', label = 'Ukr')
plt.plot(f, I, 'r.')
plt.plot(f_new, I_new, 'r-', label = 'I')
plt.xlabel('f / Hz')
plt.ylabel('U / V')
plt.title('Spannungskennlinien für Ra = 200 Ω')
plt.legend(loc = 'upper right')

plt.show()