matplotlib-users

[Matplotlib-users] example use with wxPython?

[John W. <jd...@go...>]

Hi,

I am building a wxPython app, and would like to try
incorporating matplotlib, even though the wx backend
is reportedly in its development state.
Could someone please give a snippet of code using
the wx backend? Also, do I need pygtk even though I
intend on using wxPython?

Thanks!
jgw

Re: [Matplotlib-users] example use with wxPython?

[John H. <jdh...@ac...>]

>>>>> "John" == John Wohlbier <jd...@go...> writes:

    John> Hi, I am building a wxPython app, and would like to try
    John> incorporating matplotlib, even though the wx backend is
    John> reportedly in its development state.  Could someone please
    John> give a snippet of code using the wx backend? Also, do I need
    John> pygtk even though I intend on using wxPython?

The matplotlib code you write is more or less backend independent
(same for gtk, wx, ps, etc..).  You do not need pygtk.  You just need
wxpython and Numeric - which are both included in the enthought
edition of python for win32, by the way; http://enthought.com/python.

If you just want to make some figure windows to explore the plotting
commands, you have 2 choices

  import matplotlib
  matplotlib.use('WX')
  from matplotlib.matlab import *
  plot([1,2,3])  
  show()

or 
  # myscript.py
  from matplotlib.matlab import *
  plot([1,2,3])  
  show()

 > python myscript.py -dWX

That is, you choose the wx backend either by doing 'use' or -dWX.  See
http://matplotlib.sourceforge.net/backends.html for more info.

See the examples dir of the src distro for examples of how to make
plots more sophisticated than [1,2,3].

But I gather from your post that you want to see an example of
embedding the plot in an application.  Jeremy, the wx backend
implemented, can probably help you more here.  In the mean time, you
might want to look at the FigureManagerWX class in the file
matplotlib/backends/backend_wx.py to see how to embed a plot in a wx
frame.

I recommend you use the latest CVS, which has a number of improvements
over the 0.32 release.  If you don't have CVS access, let me know and
I'll send you a snapshot (are you on windows).

John Hunter

Re: [Matplotlib-users] example use with wxPython?

[John W. <jd...@go...>]

Thanks, that worked for being able to generate the [1,2,3] plot
from within my application. Eventually I will want to embed
into a wxFrame, but for now I think this should suffice.

I'm actually on linux, and am using 0.32 for now. I will
get the latest CVS when I am up and running. When do you
expect to release the next version?

Thanks again,

jgw

>>>>>> "John" == John Wohlbier <jd...@go...> writes:
>
>     John> Hi, I am building a wxPython app, and would like to try
>     John> incorporating matplotlib, even though the wx backend is
>     John> reportedly in its development state.  Could someone please
> John> give a snippet of code using the wx backend? Also, do I need
> John> pygtk even though I intend on using wxPython?
>
> The matplotlib code you write is more or less backend independent
> (same for gtk, wx, ps, etc..).  You do not need pygtk.  You just need
> wxpython and Numeric - which are both included in the enthought
> edition of python for win32, by the way; http://enthought.com/python.
>
> If you just want to make some figure windows to explore the plotting
> commands, you have 2 choices
>
>   import matplotlib
>   matplotlib.use('WX')
>   from matplotlib.matlab import *
>   plot([1,2,3])
>   show()
>
> or
>   # myscript.py
>   from matplotlib.matlab import *
>   plot([1,2,3])
>   show()
>
>  > python myscript.py -dWX
>
> That is, you choose the wx backend either by doing 'use' or -dWX.  See
> http://matplotlib.sourceforge.net/backends.html for more info.
>
> See the examples dir of the src distro for examples of how to make plots
> more sophisticated than [1,2,3].
>
> But I gather from your post that you want to see an example of
> embedding the plot in an application.  Jeremy, the wx backend
> implemented, can probably help you more here.  In the mean time, you
> might want to look at the FigureManagerWX class in the file
> matplotlib/backends/backend_wx.py to see how to embed a plot in a wx
> frame.
>
> I recommend you use the latest CVS, which has a number of improvements
> over the 0.32 release.  If you don't have CVS access, let me know and
> I'll send you a snapshot (are you on windows).
>
> John Hunter

Re: [Matplotlib-users] example use with wxPython?

[John H. <jdh...@ac...>]

>>>>> "John" == John Wohlbier <jd...@go...> writes:

    John> Thanks, that worked for being able to generate the [1,2,3]
    John> plot from within my application. Eventually I will want to
    John> embed into a wxFrame, but for now I think this should
    John> suffice.

I know Jeremy is planning on writing some example code to show how to
embed wx in an application with or without the navigation toolbar, and
possibly provide some utility classes to make it really easy.

If you have bug reports or suggestions for improvement regarding the
wx backend, the best place to send them is the matplotlib-dev mailing
list - http://sourceforge.net/mailarchive/forum.php?forum_id=36187.
There is a list of known bugs in header of the backend_wx.py code.

    John> I'm actually on linux, and am using 0.32 for now. I will get
    John> the latest CVS when I am up and running. When do you expect
    John> to release the next version?

We're shooting for early December.

JDH

Re: [Matplotlib-users] example use with wxPython?

[John W. <jd...@go...>]

I ended up downloading the latest CVS using the command
cvs -z3 -d:pserver:ano...@cv...:/cvsroot/matplotlib co
matplotlib

and doing python setup.py install

Now when I run my application (which worked with version 0.32) I get
this error on startup
Traceback (most recent call last):
  File "./mptwt.py", line 3, in ?
    from mp_win import *
  File "./mp_win.py", line 10, in ?
    from matplotlib.matlab import *
  File "/usr/lib/python2.2/site-packages/matplotlib/matlab.py", line 121,
in ?
    from axes import Subplot, Axes
  File "/usr/lib/python2.2/site-packages/matplotlib/axes.py", line 118, in ?
    import backends
  File "/usr/lib/python2.2/site-packages/matplotlib/backends/__init__.py",
line 21, in ?
    from backend_wx import AxisText, Figure, FigureManager, Gcf, \
  File
"/usr/lib/python2.2/site-packages/matplotlib/backends/backend_wx.py",
line 164, in ?
    from matplotlib._matlab_helpers import FigureManagerBase, GcfBase
ImportError: cannot import name FigureManagerBase


Am I doing something wrong? I guess I'll go back to version 0.32
for a while.

By the way, when I run the python setup.py install command will
the script properly overwrite the existing version of the matplotlib
library, or should I go in and delete the old library first?

Thanks!

jgw


>>>>>> "John" == John Wohlbier <jd...@go...> writes:
>
>     John> Hi, I am building a wxPython app, and would like to try
>     John> incorporating matplotlib, even though the wx backend is
>     John> reportedly in its development state.  Could someone please
> John> give a snippet of code using the wx backend? Also, do I need
> John> pygtk even though I intend on using wxPython?
>
> The matplotlib code you write is more or less backend independent
> (same for gtk, wx, ps, etc..).  You do not need pygtk.  You just need
> wxpython and Numeric - which are both included in the enthought
> edition of python for win32, by the way; http://enthought.com/python.
>
> If you just want to make some figure windows to explore the plotting
> commands, you have 2 choices
>
>   import matplotlib
>   matplotlib.use('WX')
>   from matplotlib.matlab import *
>   plot([1,2,3])
>   show()
>
> or
>   # myscript.py
>   from matplotlib.matlab import *
>   plot([1,2,3])
>   show()
>
>  > python myscript.py -dWX
>
> That is, you choose the wx backend either by doing 'use' or -dWX.  See
> http://matplotlib.sourceforge.net/backends.html for more info.
>
> See the examples dir of the src distro for examples of how to make plots
> more sophisticated than [1,2,3].
>
> But I gather from your post that you want to see an example of
> embedding the plot in an application.  Jeremy, the wx backend
> implemented, can probably help you more here.  In the mean time, you
> might want to look at the FigureManagerWX class in the file
> matplotlib/backends/backend_wx.py to see how to embed a plot in a wx
> frame.
>
> I recommend you use the latest CVS, which has a number of improvements
> over the 0.32 release.  If you don't have CVS access, let me know and
> I'll send you a snapshot (are you on windows).
>
> John Hunter

Re: [Matplotlib-users] example use with wxPython?

[John H. <jdh...@ac...>]

>>>>> "John" == John Wohlbier <jd...@go...> writes:

    John> Am I doing something wrong? I guess I'll go back to version
    John> 0.32 for a while.

No, it appears your CVS mirror is behind.  This happens all the time.
Here is a snapshot

  http://nitace.bsd.uchicago.edu:8080/files/share/matplotlib-0.40g.tar.gz

    John> By the way, when I run the python setup.py install command
    John> will the script properly overwrite the existing version of
    John> the matplotlib library, or should I go in and delete the old
    John> library first?

The installer will overwrite files but will not delete files that are
no longer used.  There is no harm in deleting the old library and it
might do some good.

    John> Thanks!

No problem ...

JDH