Hi, I just discovered the matplotlib.matlab
> libraries. I am trying to create a dynamic graph using
> this library. So far I am only able to create a static
> view of the grap. Is is possible to create a graph that
> is dynamic? (Example: in windows if you select task
> manager you get a graph that shows you dynamic
> information about the CPU and Memory Usage history.) I
> just want to repaint the graph rather than closing it
> and re-showing it.
Yes, this is possible. The two key ingredients are 1) the use of the
gtk.timeout_add function which will repeatedly call a function of your
choice and 2) call the relevant axis/line/patch methods to update your
Here is an example, that resets the x and y data of the plot every
from matplotlib.matlab import *
fig = figure(1)
ind = arange(30)
X = rand(len(ind),10)
lines = plot(X[:,0], 'o')
updatefig.count += 1
if updatefig.count<10: return gtk.TRUE
else: return gtk.FALSE
updatefig.count = 0
The timeout_add function will only keep calling your method as long as
you return gtk.TRUE. So in the example above, I return False after
the 10 columns of my random matrix X are plotted.
You can control other attributes of the line in a similar way, eg, by
calling set_color, set_linewidth, etc....
If you want to use technique with bar, hist, or scatter (which return
Patch instances), you'll have to wait a few minutes while I update the
code, because I haven't added a set data method for those classes.