Re: [Matplotlib-users] gtkagg backend - update behavior question

[Alastair M. <amc...@go...>]

Hi JJ,

Thanks very much that was exactly the right solution!

Best regards,

Alastair

On Sat, Nov 28, 2009 at 12:55 AM, Jae-Joon Lee <lee...@gm...> wrote:

> 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
> <amc...@go... <amckinley03%2B...@go...>>
> 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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