Thread: [Matplotlib-users] refresh embedded plot

Hi,
I=B4m new to matplotlib. I=B4m writing a program using wxPython. The
purpose of it is to insert some prices in a form and get a plot of
them in a graph inside the main window. Is it possible to refresh the
graph with the new values after a button is pushed? How?
Thank you very much.
DG

>>>>> "daniele" =3D=3D daniele  <dga...@gm...> writes:

    daniele> Hi, I=B4m new to matplotlib. I=B4m writing a program using
    daniele> wxPython. The purpose of it is to insert some prices in a
    daniele> form and get a plot of them in a graph inside the main
    daniele> window. Is it possible to refresh the graph with the new
    daniele> values after a button is pushed? How?  Thank you very
    daniele> much.  DG

You want to define some function that updates the data in your plot
and then calls canvas.draw().  You can then connect that callback to
the clicked event of your button.

See, for example, embedding_in_wx3.py in the matplotlib examples
directory, which does just this (thanks Andrew!)

JDH

Thank you very much for your advice.
Unfortunately when I try to run the script I get:

  File "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils=
.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Python24\MathPlot_examples\examples\embedding_in_wx3.py",
line 156, in ?
    app =3D MyApp(0)
  File "C:\Python24\Lib\site-packages\wx-2.5.3-msw-ansi\wx\_core.py",
line 5301, in __init__
    self._BootstrapApp()
  File "C:\Python24\Lib\site-packages\wx-2.5.3-msw-ansi\wx\_core.py",
line 4980, in _BootstrapApp
    return _core_.PyApp__BootstrapApp(*args, **kwargs)
  File "C:\Python24\MathPlot_examples\examples\embedding_in_wx3.py",
line 111, in OnInit
    self.panel =3D XRCCTRL(self.frame,"MainPanel")
  File "C:\Python24\Lib\site-packages\wx-2.5.3-msw-ansi\wx\xrc.py",
line 203, in XRCCTRL
    return window.FindWindowById(XRCID(str_id))
AttributeError: 'NoneType' object has no attribute 'FindWindowById'

Which frankly I don=B4t understand. Any further advice?
Thank you,
DG

>>>>> "daniele" =3D=3D daniele  <dga...@gm...> writes:

    daniele> Thank you very much for your advice.  Unfortunately when
    daniele> I try to run the script I get:

    daniele>   File
    daniele> "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scr=
iptutils.py",
    daniele> line 310, in RunScript exec codeObject in
    daniele> __main__.__dict__ File
    daniele> "C:\Python24\MathPlot_examples\examples\embedding_in_wx3.py"=
,
    daniele> line 156, in ?  app =3D MyApp(0) File
    daniele> "C:\Python24\Lib\site-packages\wx-2.5.3-msw-ansi\wx\_core.py=
",
    daniele> line 5301, in __init__ self._BootstrapApp() File
    daniele> "C:\Python24\Lib\site-packages\wx-2.5.3-msw-ansi\wx\_core.py=
",
    daniele> line 4980, in _BootstrapApp return
    daniele> _core_.PyApp__BootstrapApp(*args, **kwargs) File
    daniele> "C:\Python24\MathPlot_examples\examples\embedding_in_wx3.py"=
,
    daniele> line 111, in OnInit self.panel =3D
    daniele> XRCCTRL(self.frame,"MainPanel") File
    daniele> "C:\Python24\Lib\site-packages\wx-2.5.3-msw-ansi\wx\xrc.py",
    daniele> line 203, in XRCCTRL return
    daniele> window.FindWindowById(XRCID(str_id)) AttributeError:
    daniele> 'NoneType' object has no attribute 'FindWindowById'

    daniele> Which frankly I don=B4t understand. Any further advice?
    daniele> Thank you, DG

This looks either like a wx version problem or a bad wx install.=20

wx gurus, is app =3D MyApp(0) expected to work on wx-2.5.3 ?

Can anyone test this examples/embedding_in_wx3.py under a similar
configuration?

JDH

John Hunter wrote:

> wx gurus, is app = MyApp(0) expected to work on wx-2.5.3 ?

I'm not sure, but

app = wx.GetApp()

should.

> Can anyone test this examples/embedding_in_wx3.py under a similar
> configuration?

I've been meaning to do this for ages, so I guess now's a good time. 
I'll report back if/when I get to it!

-Chris


-- 
Christopher Barker, Ph.D.
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Chr...@no...

I haven't tried wxPython with Python2.4, but with WinXP, 
Python 2.3.2, wxPython 2.5.3.1, and matplotlib 0.72.0, 
 embedding_in_wx.py
 embedding_in_wx2.py
 embedding_in_wx3.py

all work ok for me. For completeness,

 embedding_in_wx4.py 

fails:
   Traceback (most recent call last):
     File "embedding_in_wx4.py", line 22, in ?
       from matplotlib.numerix import rand
   ImportError: cannot import name rand

but replacing
   from matplotlib.numerix import rand
with
   from matplotlib.numerix.random_array import random as rand

fixes that problem.  I think embedding_in_wx4.py has some other
problems (Toolbar2 is not visible without a resize, the window
does not respond to all events, including closing the window),
but that's a separate topic.

I agree with John's assessment that the original poster probably
had a bad install of wx.  Does the wx demo run ok?? Do any other
matplotlib examples run?  If so, another suggestion would be to
try to replace MyApp(0)  with PySimpleApp(0).

Hope that helps,

--Matt