matplotlib-users Mailing List for matplotlib

On Fri, Jul 8, 2011 at 5:11 PM, Geoffrey Irving <ir...@na...> wrote:

> Hello,
>
> I'm using matplotlib through MacPorts (py26-matplotlib
> @1.0.1_2+tkinter) on Mac OS X 10.6.8.  If I run pylab.show() from a
> script, the plot window starts up in the background rather than taking
> focus.  Is anyone else seeing this behavior or have ideas as to
> workarounds?
>

Hi,

Just for reference this windowing issue has been brought up before and
appears to be an issue on other backends/OSs:
http://www.mail-archive.com/mat...@li.../msg18200.html

The last reply<http://www.mail-archive.com/mat...@li.../msg18216.html>in
the thread suggests that controlling this behavior can be done, but
needs
someone with enough motivation to do it. Every few months, I get annoyed
enough with the current behavior that I look into trying to make the
suggested changes; soon after, I realize that I'm terrible at GUI
programming.

Best,
-Tony

Hello,

I'm using matplotlib through MacPorts (py26-matplotlib
@1.0.1_2+tkinter) on Mac OS X 10.6.8.  If I run pylab.show() from a
script, the plot window starts up in the background rather than taking
focus.  Is anyone else seeing this behavior or have ideas as to
workarounds?

There's a Raise function in wxWidgets that could in theory bring the
window into focus, but I'm not sure how to get access to the
appropriate object to call Raise on.

Thanks,
Geoffrey

It's hard to say from the code snippet, but I would track down whether 
self.page_graph.figure is the figure that you think it is.  It could be 
a Figure object without any axes on it.

Cheers,
Mike

On 07/08/2011 03:55 AM, Sebastian Rhode wrote:
> Hi,
>
> I use the followng function for my application:
>
> def OnSaveAs(self, event):
>
>      dlg = wx.FileDialog(self, 'Choose a Filename', os.getcwd(), '', 
> '*.png*', wx.SAVE | wx.OVERWRITE_PROMPT)
>
>      if dlg.ShowModal() == wx.ID_OK:
>
>          savename = dlg.GetPath()
>
>          self.page_graph.figure.savefig(savename)
>
>      dlg.Destroy()
>
>
> This seems to work, but when I open the resulting PNG, only the figure 
> is saved without the graph ... But when I use the save button from the 
> figure itself, the result is fine, the figure is save with the graph. 
> So I can just removed that function, but I am curious, why it does not 
> work as expected. Any ideas, what my mistake is?
>
> Cheers,
>
> Sebi
>
>
> ------------------------------------------------------------------------------
> All of the data generated in your IT infrastructure is seriously valuable.
> Why? It contains a definitive record of application performance, security
> threats, fraudulent activity, and more. Splunk takes this data and makes
> sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-d2d-c2
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Hi Paul,

I am using py2exe, hence the *.exe.   The application is otherwise straight python.

Noah.

-----Original Message-----
From: Paul Ivanov [mailto:piv...@gm...] 
Sent: July-08-11 11:56 AM
To: mat...@li...
Subject: Re: [Matplotlib-users] Matplotlib crash on Windows 2008 Server

Noah Aklilu, on 2011-07-07 16:06,  wrote:
> I am using matplotlib as part of a data analysis tool, and I am having 
> problems with a crash on Windows 2008 server when plotting data.  The 
> application use to run fine, though I guess there was a round of 
> windows updates recently (including some
> VC++ 2008 runtime updates).  No problems on Windows 7
> professional with the same runtime updates.
> 
> I have tracked the problem down to the function call to 
> update_path_extents in the _path.pyd module from transforms.py
> (L821 in 1.0.1).
> 
> Anyone else seeing this?

Hi Noah,

I'm not on windows, but is this an application that you built and compiled? Is recompiling matplotlib an option?

best,
--
Paul Ivanov
314 address only used for lists,  off-list direct email at:
http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 

On Wed, Jun 29, 2011 at 10:46 AM, Jorge Garcia <jga...@fi...> wrote:
> Hello,
>
> I was trying to test out the Python 3 development version with the first
> plot shown in the pyplot tutorial. Everything seems to work ok until I go
>
> plt.show()
>
> at which point nothing happens, I don't see a plot. Python accepts the
> command and is waiting for a new command but I have no plot.

Maybe you don't have a python-3 compatible gui library installed, in
which case your backend is defaulting to AGG, which cannot render a
window for you.

> I've tried changing the backend in the matplotlibrc file to TkAgg, but I
> still get nothing, in fact now when I try to import matplotlib I get a
> traceback error that name -tkagg is not defined, seems like it might be
> something in the module.
>
> Can anyone lend a hand?

Posting the exact traceback would help us help you. I'll hazard a
guess that you don't have the tk development packages installed, so
the tkagg backend could not be built when you installed matplotlib for
py3, and therefore tkagg cannot be selected as your backend.

Darren

How Would I set the backend to Tk?

Do I have to change something in the matplotlibrc file? Maybe I have to
specify where Tk is located?

Any guidance would be helpful.

Thanks again,
Jorge Garcia

On Sun, Jul 3, 2011 at 6:55 PM, Jorge Garcia <jga...@fi...> wrote:

> Hi Chris,
>
> No I haven't been able to yet, but I'm hoping to get it working with a
> little help. Matplotlib I think is the last library that needs to be ported
> to finally make the transition to Python3 feasible for the mainstream Python
> users. That and maybe wxPython, but since I don't use wxPython it's not
> really an issue for me.
>
> Best Regards,
>
>
> On Sat, Jul 2, 2011 at 7:04 PM, Chris Edwards <cb...@oz...> wrote:
>
>> Hi Jorge,
>>
>> I had the same problem with Python(xy) and couldn't get help so I went
>> back to an earlier version that worked for me.
>>
>> Did you solve the problem?
>>
>> Chris
>>
>> On 30/06/2011, at 12:46 AM, Jorge Garcia wrote:
>>
>> > Hello,
>> >
>> > I was trying to test out the Python 3 development version with the first
>> plot shown in the pyplot tutorial. Everything seems to work ok until I go
>> >
>> > plt.show()
>> >
>> > at which point nothing happens, I don't see a plot. Python accepts the
>> command and is waiting for a new command but I have no plot.
>> >
>> > I've tried changing the backend in the matplotlibrc file to TkAgg, but I
>> still get nothing, in fact now when I try to import matplotlib I get a
>> traceback error that name -tkagg is not defined, seems like it might be
>> something in the module.
>> >
>> > Can anyone lend a hand?
>> >
>> > Thanks,
>> >
>> > Jorge Garcia
>> >
>> ------------------------------------------------------------------------------
>> > All of the data generated in your IT infrastructure is seriously
>> valuable.
>> > Why? It contains a definitive record of application performance,
>> security
>> > threats, fraudulent activity, and more. Splunk takes this data and makes
>> > sense of it. IT sense. And common sense.
>> >
>> http://p.sf.net/sfu/splunk-d2d-c2_______________________________________________
>> > Matplotlib-users mailing list
>> > Mat...@li...
>> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>>
>

Noah Aklilu, on 2011-07-07 16:06,  wrote:
> I am using matplotlib as part of a data analysis tool, and I am
> having problems with a crash on Windows 2008 server when
> plotting data.  The application use to run fine, though I guess
> there was a round of windows updates recently (including some
> VC++ 2008 runtime updates).  No problems on Windows 7
> professional with the same runtime updates.
> 
> I have tracked the problem down to the function call to
> update_path_extents in the _path.pyd module from transforms.py
> (L821 in 1.0.1).
> 
> Anyone else seeing this?

Hi Noah,

I'm not on windows, but is this an application that you built and
compiled? Is recompiling matplotlib an option?

best, 
-- 
Paul Ivanov
314 address only used for lists,  off-list direct email at:
http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 

Nat Echols, on 2011-06-28 12:58,  wrote:
> We started using Python 2.7.2 a week or two ago, and I'm now running into
> this problem when attempting to build matplotlib 1.0.1 on several of our
> machines:
> 
> Traceback (most recent call last):
>   File "setup.py", line 162, in <module>
>     if check_for_tk() or (options['build_tkagg'] is True):
>   File
> "/Volumes/Scratch1/nat/phenix_installer/build-source/mac-intel-osx/patchnose/tmp/matplotl
> ib-1.0.1/setupext.py", line 832, in check_for_tk
>     (Tkinter.__version__.split()[-2], Tkinter.TkVersion,
> Tkinter.TclVersion))
> IndexError: list index out of range
> 
> When I run the version of Python that I'm using to build matplotlib, this is
> what I'm seeing:
> 
> >>> import Tkinter
> >>> Tkinter.__version__
> '$Revision$'

Hi Nat,
 
It's strange that your Tkinter got built without a typical
version string. For me:

In [1]: import Tkinter

In [2]: Tkinter.__version__
Out[2]: '$Revision: 73770 $'

In [3]: Tkinter.__version__.split()[-2]
Out[3]: '73770'

> I don't need or want Tkinter support either in Python or in matplotlib, but
> it appears to be impossible to disable Tkinter when compiling Python.  Is
> there a way around this problem without patching the Python build, or
> matplotlib, or both?

I'm not sure about Python, but for matplotlib, just add these two
lines to your setup.cfg (or create one with these two lines in
it):

[gui_support]
tkagg = False

You can read the setup.cfg.template for a full explanation (and
other install options available to you).A

best,
-- 
Paul Ivanov
314 address only used for lists,  off-list direct email at:
http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 

I am trying to make a 3D surfplot from multiple "patches". Basically, my function is split up into several blocks, and I to plot them one after the other into the same figure in order to get the full plot. I manage to get the data plotted, but it looks awful. It seems like the data is not layered correctly, with parts of the data that should be behind other things instead get in front of them. I attach example figures to illustrate my problem

1. 'image-bw.png'. No colors filled in (alpha = 0). 
2. 'image-color.png'. With colors, alpha = 1.  
3. 'image-color-rot.png'. The same plot as 2, but slightly rotated. 

Note how the problems dissappear in figure 3, where the plot has been rotated.

This is the function that does the plotting. It simply iterates over the blocks, and plots each block's data in the sub-domain that it represents.

def plotSurface(self):
    fig = plt.figure()
    ax = fig.gca(projection='3d')
    minAbsVal = self.min()
    maxAbsVal = self.max()
    Z_norm = plt.Normalize(minAbsVal, maxAbsVal)
    for node in self.nodes:
        if node.type == 'leaf':
            X = np.linspace(node.block.bounds[0,0], node.block.bounds[0,1], node.block.nx[0])
            Y = np.linspace(node.block.bounds[1,0], node.block.bounds[1,1], node.block.nx[1])
            X, Y = np.meshgrid(X, Y)
            Z = abs(node.block.data)
            pl = ax.plot_surface(X, Y, Z, rstride=2, cstride=2, cmap=mpl.cm.jet, norm=Z_norm, linewidth=0.1, alpha=1.0, shade=True, antialiased=True)

    domain_bounds = self.nodes[0].block.bounds 
    ax.set_xlabel('X')
    ax.set_xlim3d(domain_bounds[0,0], domain_bounds[0,1])
    ax.set_ylabel('Y')
    ax.set_ylim3d(domain_bounds[1,0], domain_bounds[1,1])
    ax.set_zlabel('Z')
    ax.set_zlim3d(minAbsVal,maxAbsVal)


Is this a bug or am I doing something wrong?

Best Regards,
Magnus Gustafsson

Hi,

I use the followng function for my application:

def OnSaveAs(self, event):

     dlg = wx.FileDialog(self, 'Choose a Filename', os.getcwd(), '',
'*.png*', wx.SAVE | wx.OVERWRITE_PROMPT)

     if dlg.ShowModal() == wx.ID_OK:

         savename = dlg.GetPath()

         self.page_graph.figure.savefig(savename)

      dlg.Destroy()

This seems to work, but when I open the resulting PNG, only the figure is
saved without the graph ... But when I use the save button from the figure
itself, the result is fine, the figure is save with the graph. So I can just
removed that function, but I am curious, why it does not work as expected.
Any ideas, what my mistake is?

Cheers,

Sebi

Hi.

I have a set of data with a range of (say) 0 to 100.  Is it possible
to get matplotlib to use the same colour for 0 and 100, so that the
colours "meet" at the ends of the color bar?

One workaround is to just manipulate the data (eg. using abs (x-50)),
but I would rather not, if possible.

Thanks, Ben