Hi all,
How do I use animation.FuncAnimation to plot real-life
data from parsing a text file ?
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import sys
import time
import re
x = [] # x
y = [] # y
fig = plt.figure()
ax = fig.add_subplot(111)
curve,= ax.plot([],[],lw=2)
ax.set_xlim(0,5)
ax.grid()
def tail_f(file):
interval = 1.0
while True:
where = file.tell() # current file position, an
integer (may be a long integer).
line = file.readline()
if re.search('without errors',line): break
if not line:
time.sleep(interval)
file.seek(where) # seek(offset[, whence]) ->
None. Move to new file position.
else:
yield line
def run():
for line in tail_f(open(sys.argv[1])):
print line,
if re.search('x=',line):
liste = line.split('=')
x.append(liste[1].strip())
if re.search('y=',line):
liste = line.split('=')
y.append(liste[1].strip())
curve.set_data(x,y)
print x,y
#
#
#
run()
plt.show()
The text file looks like
x=0.0
y=0.0
blabla
x=1.0
y=1.0
blabla
x=2.0
y=4.0
blabla
...
Nils
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