Re: [Matplotlib-users] dynamic update in TkAgg ? (more)

[John H. <jdh...@ac...>]

>>>>> "Gary" == Gary Pajer <pa...@in...> writes:

    Gary> I took out a wristwatch and timed it instead of guessing.  I
    Gary> get three frames per second.  It's about 4x from where we
    Gary> started, but still slow.  I guess I'm just underpowered,
    Gary> although a couple of years ago this was a powerhouse.  It
    Gary> seems that matplotlib may not be suited to this task.  I
    Gary> don't think it should take 2 GHz just to power a stripchart.

One more comment here, mainly for Todd.  

Todd, I get 34 FPS on anim.py with GTKAgg and only 21 FPS with the
anim_tk.py, where both scripts are doing the same thing.  The profiler
reveals a good chunk of the time is in

      103    2.300    0.022    2.300    0.022 tkagg.py:4(blit)

This may be a tk limitation, but I just wanted to point it out to you
in case there are any optimizations you can apply to that function.

I'll include the anim_tk.py I'm using for profiling below.

Cheers,
JDH

#!/usr/bin/env python2.3
import matplotlib
matplotlib.use('TkAgg')
import matplotlib.matlab
import Tkinter as Tk
import matplotlib.numerix as numerix

fig = matplotlib.matlab.figure(1)
ind = numerix.arange(60)
x_tmp=[]
for i in range(100):
    x_tmp.append(numerix.sin((ind+i)*numerix.pi/15.0))

X=numerix.array(x_tmp)
lines = matplotlib.matlab.plot(X[:,0],'o')

manager = matplotlib.matlab.get_current_fig_manager()
def updatefig(*args):
    updatefig.count += 1
    lines[0].set_ydata(X[:,updatefig.count%60])
    manager.canvas.draw()
    return updatefig.count
updatefig.count=-1


manager.show()
import time
tstart = time.time()
while 1:
    cnt = updatefig()
    if cnt==100: break
    



print 'FPS', 100.0/(time.time() - tstart)