Re: [Matplotlib-users] ignorant q: continuous refreshing a plot with different data

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

>>>>> "Todd" == Todd G Gardner <pi...@ea...> writes:

    Todd> Hello all, Please pardon my ignorance as I am fairly new to
    Todd> matplotlib.

    Todd> I have 1000 sets of (x,y) data.  I would like to cycle
    Todd> through this data by graphing set 1 then 2 then ... 1000.

    Todd> How can I refresh a plot without closing and reopening that
    Todd> plot?

Pekko Piirola <pek...@he...> sent me an example some time
ago that cycles through a data set.  Currently this example only works
in the GTK backend, but we're actively working on getting a unified
GUI interface to allow for this kind of thing.  You may also want to
take a look at examples/system_monitor.py and examples/dynamic_demo.py
which show how to dynamically update a plot.

#!/usr/bin/env python2.3

import matplotlib.matlab
import gtk
import Numeric

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

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

def updatefig(*args):
    updatefig.count += 1
    if updatefig.count>59: updatefig.count=0
    lines[0].set_data(ind,X[:,updatefig.count])
    fig.draw()
    return gtk.TRUE

updatefig.count=-1

gtk.timeout_add(200,updatefig)
matplotlib.matlab.show()