Graph with Python

graph.py

import matplotlib.pyplot as plt

# load data
qos0 = open('qos0.txt').readlines()
qos1 = open('qos1.txt').readlines()
qos2 = open('qos2.txt').readlines()

qos0 = qos0[1:]
qos1 = qos1[1:]
qos2 = qos2[1:]

x0 = []
y0 = []
x1 = []
y1 = []
x2 = []
y2 = []

# time,connected,subscribed,published_per_sec,published,puback,received,response
for l in qos0:
    items = l.split(',')
    x0.append(items[3])
    y0.append(items[7])

for l in qos1:
    items = l.split(',')
    x1.append(items[3])
    y1.append(items[7])

for l in qos2:
    items = l.split(',')
    x2.append(items[3])
    y2.append(items[7])
    
# plot

plt.title('MQTT performance on my Macbook Air')
plt.xlabel('publishes per seconds')
plt.ylabel('response time')
plt.plot(x0, y0, 'r', label='qos0')
plt.hold(True)
plt.plot(x1, y1, 'g', label='qos1')
plt.hold(True)
plt.plot(x2, y2, 'b', label='qos2')
plt.legend(loc='upper left')
plt.show()