[Matplotlib-users] Re: Memory usage

[Werner F. B. <wer...@fr...>]

Hi Matt,

Matt Newville wrote:

> Hi Werner,
> 
> I think what you may want is something like this:
> 
>     def OnButton1Button(self, event):
>         print 'done it'
>         ### self.figure.clear()
>         ### self.axes = self.figure.add_subplot(111)
>         self.axes.cla()            # <-- clear the axes
>         t = arange(0.0,4.0,0.01)
>         s = sin(2*pi*t)
> 
>         self.axes.plot(t,s)
>         self.axes.set_xlabel('Time 2 (s)')
>         self.axes.set_ylabel('Price 2 ($)')
>         self.canvas.draw()         # <-- force a redraw
> 
> Is that OK?  It works for me on Windows and Linux.  I do the
> same thing for 'make a fresh plot' in my own codes that I know
> work OK on Mac OS X as well.

Yes, that works too.

So, I can do:
self.figure.clear()
...
self.canvas.Refresh()

or:
self.axes.cla()
...
self.canvas.draw()

or:
self.figure.clear()
...
self.canvas.draw()


Note that all of the above still have problems if I do:
         self.figure = Figure(frameon=False)

i.e. the "frameon=False" bit causes the figure/axes not to get totally 
cleared.

> 
> Cheers,
> 
> --Matt
> 
> 
See you
Werner