Maybe this thread is helpful.
http://old.nabble.com/Problem-with-simple-use-of-draw%28%29-in-animations-of-arrays-tt26174627.html#a26175190
I guess your code will work simply by calling "recache()" instead of set_ydata.
Regards,
-JJ
On Sat, Nov 28, 2009 at 4:50 AM, Alastair McKinley
<amckinley03+mp...@googlemail.com> wrote:
> Hi everyone,
>
> I am a new matplotlib user building a simple visualization tool.
>
> I was having some issues with the graph not redrawing and I think I have
> reduced it to a minimal case that doesn't work as expected for me.
>
> In the example below one of the data elements is changed on every iteration
> of the update function, but the graph does not update as expected.
>
> Am I making a mistake in my usage?
>
> Alastair
>
>
>
> #!/usr/bin/env python
>
> import gtk
> import gobject
> from matplotlib.figure import Figure
> import numpy as np
>
> from matplotlib.backends.backend_
> gtkagg import FigureCanvasGTKAgg as FigureCanvas
>
> def update(line):
> global data
> data[20]=data[20]+0.5
> line.set_ydata(data)
> line.axes.figure.canvas.draw()
> return True
>
> win = gtk.Window()
> win.connect("destroy", lambda x: x.destroy())
> win.set_default_size(400,300)
> fig = Figure(figsize=(5,4), dpi=100)
> ax = fig.add_subplot(111)
> canvas = FigureCanvas(fig)
> win.add(canvas)
>
> data = np.random.randn(100)
> line, = ax.plot(data)
>
> win.show_all()
>
> gobject.timeout_add(1000,update,line)
>
> gtk.main()
>
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