bmarechal / ringdown

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Commit 84d931fb3d85d2a8df0488a1b3074753b53db527

Authored by bmarechal
1 parent 98e71dda5c
Exists in master

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Showing 1 changed file with 45 additions and 0 deletions Inline Diff

File was created 1 import matplotlib.pyplot as plt
2 import numpy as np
3 import csv, glob, sys
4 from scipy.optimize import curve_fit
5
6 list_files = (glob.glob(sys.argv[1]))
7
8 data = []
9
10 for f in list_files:
11 data_iter = csv.reader(open(f, 'r'), delimiter = ',', quotechar = '"')
12 for i in range(2):
13 data_iter.next()
14 #temp_data = [value for value in data_iter] #if ends with a number
15 temp_data = [value[:-1] for value in data_iter]#if ends with a comma
16 data.extend(temp_data)
17
18 data = np.asarray(data, dtype = float)
19
20 del(temp_data, list_files, value, f)
21
22 plt.subplot(111)
23 plt.clf()
24
25 plt.plot(data[data[:,0]>=0,0], data[data[:,0]>=0,1], label ='mes')
26
27 def func(t, tau, A, w , a, b):
28 return A * np.exp(-t/tau) * np.sin((w+a*t)*t) + b
29
30 popt, pcov = curve_fit(func, data[data[:,0]>=0,0], data[data[:,0]>=0,1], p0 = [1e-5, 1e-2, 1e5, 1e10, 1e-4], maxfev=10000)
31 yfit = func(data[data[:,0]>=0,0], *popt)
32