Data Analysis In Python
A Tutorial on Analyzing/Plotting Data using Python.
Code
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import csv
import numpy as np
import matplotlib.pyplot as plt
t = []
x = []
s = []
with open('speed.csv', newline='') as csvfile:
datareader = csv.reader(csvfile, delimiter=' ', quotechar='|')
for row in datareader:
print(','.join(row))
t.append(float(row[0].split(',')[0]))
x.append(float(row[0].split(',')[1]))
s.append(float(row[0].split(',')[2]))
ts = t
t = np.divide(t,60*60)
print(t)
print(x)
print(s)
plt.close('all')
plt.subplot(2,1,1)
plt.plot(ts,x,'bd-')
thefit = np.polyfit(t,x,1)
plt.plot(ts,np.multiply(t,thefit[0])+thefit[1],'r')
plt.xlabel('Time (s)')
plt.ylabel('Distance (miles)')
plt.subplot(2,1,2)
plt.plot(ts,s,'go-')
speed= np.divide(np.diff(x),np.diff(t))
plt.plot(ts[1:]-np.average(np.diff(ts))/2,speed,'rd-')
plt.xlabel('Time (s)')
plt.ylabel('Speed (mph)')
plt.show()
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Data
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0,0,0
14.7,0.1,38
23.1,0.2,40
31.7,0.3,39
41.8,0.4,31
55.2,0.5,30
66.1,0.6,40
74.2,0.7,41
82.1,0.8,43
90.4,0.9,40
102.7,1,20
113.5,1.1,35
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#python #data #plotting #analysis
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