Matplotlib-users Digest, Vol 48, Issue 46

Community matplotlib-users
1

Yes I wrote about problem with show() , too

is matplotlib seriouse project!!!

Sandy

Hi,
I am a real newbie at matplotlib, so I apologize if this is an obvious
question.
I am running ipython in emacs and while the first time I use the show()
command in the ipython buffer the graph shows up fine, subsequent times that
I call the command it, the graph does not show up. I am on ubuntu 10.04
(64) and I built the matplotlib library from source.
I am trying to get the graphs to show up the subsequent times as well (sorry
for the pun).
Thanks for any help.

···

Ted Rosenbaum
Graduate Student
Department of Economics
Yale University

From: matplotlib-users-request@lists.sourceforge.net
Subject: Matplotlib-users Digest, Vol 48, Issue 46
To: matplotlib-users@lists.sourceforge.net
Date: Wed, 26 May 2010 04:41:13 +0000

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Today’s Topics:

  1. interpolate inside a circle (Carlos Grohmann)
  2. Re: Mac backend problems for nearly all backends.
    (Jonathan Stickel)
  3. Re: Mac backend problems for nearly all backends. (Daniel Welling)
  4. Show() in emacs (Ted Rosenbaum)
  5. Re: Mac backend problems for nearly all backends.
    (Michiel de Hoon)

Message: 1
Date: Tue, 25 May 2010 21:47:14 -0300
From: Carlos Grohmann <carlos.grohmann@…287…>
Subject: [Matplotlib-users] interpolate inside a circle
To: matplotlib-users matplotlib-users@lists.sourceforge.net
Message-ID:
<AANLkTinpc_Vk2z_jBRqfVFValApFXxLL88H-rvu2Sxgi@…288…>
Content-Type: text/plain; charset=windows-1252

Dears, I want to interpolate some irregular data using radial basis.
Can I interpolate only the data that falls inside a circle (or a
polygon)?

TIA

–
Prof. Carlos Henrique Grohmann - Geologist D.Sc.
Institute of Geosciences - Univ. of S?o Paulo, Brazil
http://www.igc.usp.br/pessoais/guano
Linux User #89721

Can?t stop the signal.

Message: 2
Date: Tue, 25 May 2010 20:48:27 -0600
From: Jonathan Stickel <jjstickel@…3078…>
Subject: Re: [Matplotlib-users] Mac backend problems for nearly all
backends.
To: matplotlib-users@…1735…sourceforge.net
Message-ID: <4BFC8BFB.9000707@…3078…>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

On 05/25/2010 matplotlib-users-request@lists.sourceforge.net wrote:

From: Christopher Barker <Chris.Barker@…259…>
Subject: Re: [Matplotlib-users] Mac backend problems for nearly all
backends.
To: matplotlib-users@…1543…rge.net
Message-ID: <4BFC626C.40707@…259…>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Jonathan Stickel wrote:

I’ve experienced many of the same problems on Mac OS X 10.6.3
(Snow
Leopard). I have python/scipy/numpy/matplotlib/ipython all
installed
via Macports.

Just to be clear – this sounds like a MacPorts problem, not
necessarily
an OS-X problem.

I finally have the WXagg backend
working, but that required installed WXPython with the gtk/X11
backend.

Does MacPorts not allow a native wx? Maybe becasue you’re running 64
bit?

Right, I am running Snow Leopard and have Python 2.6 installed 64 bit.
Apparently, Carbon requires 32 bit and wxWidgets/wxPython does not (yet)
support Cocoa. This problem will bite you in one form or another on Mac
OS X, regardless of whether you are using Macports or something else.

Anyway, I guess that’s why I don’t use macports for python.

See above.

In any case, I have been having royal problems with GUI
backends and
matplotlib.
Some background on where I’ve been having these problems:
Machine 1: OSX 10.5.8 G5 PPC

That’s what I’ve been running, and I’ve had no real issues (Haven’t
tried the OS-X back-end) – but I’m using the python.org python.

Machine 2: OSX 10.5.7 Macbook pro/Intel
Code versions: python 2.5.4, Numpy 1.3.0, Scipy 0.7.0 (all
obtained through
fink.)

OK – then a fink issue, rather than a Macports one – same idea,
though.

My impression is that neither fink nor macports do well with Mac GUI
stuff – unless you’re talking X11.

Not exactly true. Fink and Macports are tools and have their
shortcomings, but both can be immensely useful for installing all this
stuff. Otherwise, you do it manually, which of course can cause you
trouble as well. Anyway, getting off topic. I only intended to report
some form of success with the wx backend.

Jonathan

Message: 3
Date: Tue, 25 May 2010 21:23:12 -0600
From: Daniel Welling <dantwelling@…287…>
Subject: Re: [Matplotlib-users] Mac backend problems for nearly all
backends.
To: Jonathan Stickel <jjstickel@…3078…>
Cc: matplotlib-users@…2569…sourceforge.net
Message-ID:
<AANLkTikE1zURmun1h9G5D6QKdNYqtRiCSeGlW-WpqYMD@…288…>
Content-Type: text/plain; charset=“iso-8859-1”

Thanks for the info…
1)The problem does manifest in the same manner through the normal python
prompt.
2) I’m not sure what is meant by a “framework install.” Everything (except
MPL 99.1.1) was installed through fink.
3) I’ve never had problems with Fink software before, and I have a crapload
(technical term) of stuff installed. This is neither here nor there,
however, as it seems that not all Pythons are created equal.
4) A colleague of mine claims to have everything working on a new Intel mac
(I’m guessing 10.5.8) right out of MacPorts; I’ll talk to him more and try
to find out what is different between our two cases.
5) I have yet to try installing wxPython for python 2.5; this may work in
the end. It’s not in fink, so I’ve put off installing it manually. I’ll
give it a shot and let you know how it works.
6) Although I use x11 and not the native Mac terminal, I’m not sure if this
requires me to install different packages for the gui stuff. Could you guys
expand on this, please?

Finally, I’ve had some measure of success by installing Qt4 (through Fink)
and using the Qt4Agg backend. Because the current stable fink Qt4 release
(4.6.1) has a bug, I need to apply the fix found here:
http://old.nabble.com/Qt4-backend:-critical-bug-with-PyQt4-v4.6%2B-td26205716.html
in order to allow more than one plot per session to be shown. I’ll re-write
the fix here for convenience and clarity (the original did not have the
proper module references in it, so this saves some 5 minutes of
tab-completion work in ipython…)

Add this before “FigureManagerQT” class

class FigureWindow(QtGui.QMainWindow):
def init(self):
super(FigureWindow, self).init()
def closeEvent(self, event):
super(FigureWindow, self).closeEvent(event)
if QtCore.PYQT_VERSION_STR.startswith(‘4.6’):
self.emit(QtCore.SIGNAL(‘destroyed()’))

Replace “QtGui.QMainWindow” by “FigureWindow” in

“FigureManagerQT”'s constructor

This works perfectly on my Intel machine running MPL 99.1.1. It’s fast and
looks sharp. I’ll report back on the PPC/99.0 combo tomorrow; Qt4 takes a
thousand hours to compile.

Thanks for the input.

On Tue, May 25, 2010 at 8:48 PM, Jonathan Stickel <jjstickel@…3078…> wrote:

On 05/25/2010 matplotlib-users-request@lists.sourceforge.net wrote:

From: Christopher Barker <Chris.Barker@…259…>
Subject: Re: [Matplotlib-users] Mac backend problems for nearly all
backends.
To: matplotlib-users@lists.sourceforge.net
Message-ID: <4BFC626C.40707@…259…>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Jonathan Stickel wrote:

I’ve experienced many of the same problems on Mac OS X 10.6.3
(Snow
Leopard). I have python/scipy/numpy/matplotlib/ipython all
installed
via Macports.

Just to be clear – this sounds like a MacPorts problem, not
necessarily
an OS-X problem.

I finally have the WXagg backend
working, but that required installed WXPython with the gtk/X11
backend.

Does MacPorts not allow a native wx? Maybe becasue you’re running 64
bit?

Right, I am running Snow Leopard and have Python 2.6 installed 64 bit.
Apparently, Carbon requires 32 bit and wxWidgets/wxPython does not (yet)
support Cocoa. This problem will bite you in one form or another on Mac
OS X, regardless of whether you are using Macports or something else.

Anyway, I guess that’s why I don’t use macports for python.

See above.

In any case, I have been having royal problems with GUI
backends and
matplotlib.
Some background on where I’ve been having these problems:
Machine 1: OSX 10.5.8 G5 PPC

That’s what I’ve been running, and I’ve had no real issues (Haven’t
tried the OS-X back-end) – but I’m using the python.org python.

Machine 2: OSX 10.5.7 Macbook pro/Intel
Code versions: python 2.5.4, Numpy 1.3.0, Scipy 0.7.0 (all
obtained through
fink.)

OK – then a fink issue, rather than a Macports one – same idea,
though.

My impression is that neither fink nor macports do well with Mac GUI
stuff – unless you’re talking X11.

Not exactly true. Fink and Macports are tools and have their
shortcomings, but both can be immensely useful for installing all this
stuff. Otherwise, you do it manually, which of course can cause you
trouble as well. Anyway, getting off topic. I only intended to report
some form of success with the wx backend.

Jonathan

Matplotlib-users mailing list
Matplotlib-users@…712…orge.net
matplotlib-users List Signup and Options

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Message: 4
Date: Tue, 25 May 2010 23:40:25 -0400
From: Ted Rosenbaum <ted.rosenbaum@…1927…>
Subject: [Matplotlib-users] Show() in emacs
To: matplotlib-users@lists.sourceforge.net
Message-ID:
<AANLkTikzovHvM383Jlk0QnDLF04H4hhp4ubq6-KeCIUk@…288…>
Content-Type: text/plain; charset=“iso-8859-1”

Hi,
I am a real newbie at matplotlib, so I apologize if this is an obvious
question.
I am running ipython in emacs and while the first time I use the show()
command in the ipython buffer the graph shows up fine, subsequent times that
I call the command it, the graph does not show up. I am on ubuntu 10.04
(64) and I built the matplotlib library from source.
I am trying to get the graphs to show up the subsequent times as well (sorry
for the pun).
Thanks for any help.

Ted Rosenbaum
Graduate Student
Department of Economics
Yale University
-------------- next part --------------
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Message: 5
Date: Tue, 25 May 2010 21:41:06 -0700 (PDT)
From: Michiel de Hoon <mjldehoon@…9…>
Subject: Re: [Matplotlib-users] Mac backend problems for nearly all
backends.
To: Jonathan Stickel <jjstickel@…3078…>, Daniel Welling
<dantwelling@…287…>
Cc: matplotlib-users@lists.sourceforge.net
Message-ID: <812729.93601.qm@…2595…>
Content-Type: text/plain; charset=“iso-8859-1”

1)The problem does manifest in the same manner through the normal python
prompt.

OK that is good to know.

  1. I’m not sure what is meant by a “framework install.” ?Everything
    (except MPL 99.1.1)
    was installed through fink.

This is important. Check where python is installed. If ‘which python’ shows /Library/Frameworks/Python.framework/Versions/2.6/bin/python or something similar, you have a framework version. If on the other hand it shows /usr/bin/python, /usr/local/bin/python, or something similar, you don’t have a framework version. I don’t know what fink installs by default. If you don’t have Python installed as a framework, some backends (including the MacOSX backend) will not interact properly with the window manager. This is a Mac peculiarity. If you build Python from source, you can specify to install a framework version by passing the --enable-framework option to the configure script.

  1. Although I use x11 and not the native Mac terminal, I’m not sure if this requires me to > install different packages for the gui stuff. ?Could you guys expand on this, please?

Some backends go make use of X11 (e.g., the gtkcairo backend), others do not (e.g., the MacOSX backend). The MacOSX backend should work with both the native Mac terminal and with an X11 terminal.

–Michiel.

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