Komplet prekresleni (''cla(); plot(...)''):

<file python a1.py>
#!/usr/bin/python
from pylab import *
import time

figure()
show(False)
while True:
    y = np.random.normal(size=10000)
    t = time.time()
    cla()
    plot(y)
    draw()
    print time.time()-t
</file>

Modifikace existujuceho objektu (''line.set_?data(...)''):

<file python a1.py>
#!/usr/bin/python
from pylab import *
import time

figure()
show(False)
y = np.random.normal(size=10000)
l, = plot(y)
while True:
    y = np.random.normal(size=10000)
    t = time.time()
    l.set_ydata(y)
    draw()
    print time.time()-t
</file>

Nahodna prochazka:

<file python walk0.py>
#!/usr/bin/python
from pylab import *

t = 2*pi*rand(1000000)
xs = cumsum(sin(t))
ys = cumsum(cos(t))
plot(xs,ys)
show()
</file>



<file python walk1.py>
#!/usr/bin/python
from pylab import *
x,y = 0,0
xs = [x]
ys = [y]

figure()
show(False)
for i in xrange(500):
    t = 2*pi*rand()
    x += sin(t)
    y += cos(t)
    xs.append(x)
    ys.append(y)
    cla()
    plot(xs,ys)
    draw()
</file>


<file python walk2.py>
#!/usr/bin/python
from pylab import *
x,y = 0,0
xs = [x]
ys = [y]
fnames = []
import time

tstart = time.time()
figure()
show(False)
for i in xrange(50):
    fname = "walk{:03d}.png".format(i)
    print fname

    t = 2*pi*rand()
    x += sin(t)
    y += cos(t)
    xs.append(x)
    ys.append(y)
    cla()
    plot(xs,ys)
    draw()

    savefig(fname)
    fnames.append(fname)
print time.time()-tstart

import subprocess, os
print "merging animation"
subprocess.check_call(["convert"] + fnames + ["walk.gif"])
print "deleting temp. files"
for fname in fnames:
    os.remove(fname)
</file>

{{:python:walk.gif|}}

<file python walk3.py>
#!/usr/bin/python
from pylab import *
x,y = 0,0
xs = [x]
ys = [y]
lines = []
import time

tstart = time.time()
f = figure()
for i in xrange(50):
    print i
    t = 2*pi*rand()
    x += sin(t)
    y += cos(t)
    xs.append(x)
    ys.append(y)
    lines.append(plot(xs,ys,"b-"))
print time.time() - tstart

from matplotlib.animation import ArtistAnimation
a = ArtistAnimation(f, lines, interval=50, blit=True)
a.save('walker.mp4', 'avconv', fps=20, extra_args=['-vcodec', 'libx264']))
show()
</file>

{{:python:walker.mp4|}}

<file python walk4.py>
#!/usr/bin/python
from pylab import *

N = 50
t = 2*pi*rand(N)
xs = cumsum(sin(t))
ys = cumsum(cos(t))

f = figure()
l, = plot([],[])
xlim(-10,10)
ylim(-10,10)

def func(i):
    print i
    l.set_data(xs[:i],ys[:i])
    return l,

from matplotlib.animation import FuncAnimation
a = FuncAnimation(f, func, frames=N, interval=50, blit=True)
a.save('walker.mp4', 'avconv', fps=20, extra_args=['-vcodec', 'libx264'])
show()
</file>