On Thu, May 28, 2009 at 6:01 PM, Sandro Tosi <mo...@debian.org> wrote:

> Hi Darren,
>
> On Thu, May 28, 2009 at 19:16, Darren Dale <dsdal...@gmail.com> wrote:
> > Try the attached script.
>
> Oh it works very great! thanks you very much!
>
> One thing I've done is also remove
>
> import matplotlib
> matplotlib.use('Qt4Agg')
>
> since we're already importing the qt4agg backend directly right after.
>
> One only thing it's left a bit obscure (also because doc is a little
> missing) is this piece of code:
>
>        # update the data
>        self.line.set_ydata(np.sin(self.x+self.cnt/10.0))
>        # just draw the animated artist
>        self.ax.draw_artist(self.line)
>        # just redraw the axes rectangle
>        self.blit(self.ax.bbox)
>
> first, I've not clear wat draw_artist and blit does, so if you can
> shine some light on me :)
>
> Secondly, the "effect" I'd like to achieve is to update the current
> line values and "replace" the current line with a new one. In this
> code, instead, the line is plotted keeping the previous instances
> around. So the effect is to fil the canvas with sin function plots
> instead of updating only one instance.
>
> Do you know how to "fix" this?
>

Not off the top of my head. Maybe someone else on the list can offer a
suggestion.

Darren
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