matplotlib-users Mailing List for matplotlib

Yes, I believe so. I believe it is possible to create the axes with
navigation disabled so that their callbacks are never connected. Then, you
can use the same callback system to trigger the axes pan and zoom on your
own controls.
http://matplotlib.sourceforge.net/users/event_handling.html
http://matplotlib.sourceforge.net/api/axes_api.html
(particularly about disconnect() and drag_pan() and friends).
Maybe someone else knows of an example?
Ben Root
On Thu, Jul 8, 2010 at 4:55 PM, German Ocampo <ger...@gm...> wrote:
> Good afternoon
>
> I'm working in an application with a simple figure embbebed in a QT
> Dialog. I want to instead of use the navigation toolbar of matplotlib,
> have some Qt push buttons in the form, that allow to perform the Zoom
> and Pan. Is it possible to do it?
>
> Many thanks for your help
>
> German
>
>
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Hello,
I keep getting the error "ValueError: Need more than 1 value to unpack" 
every time I try to use the line ax.plot_wireframe(myArray[:,0], 
myArray[:,1], myArray[:,2])
What does that error mean?
Thanks,
Shir

Good afternoon
I'm working in an application with a simple figure embbebed in a QT
Dialog. I want to instead of use the navigation toolbar of matplotlib,
have some Qt push buttons in the form, that allow to perform the Zoom
and Pan. Is it possible to do it?
Many thanks for your help
German

In article <0D8...@gm...>,
 Edward Barnard <edb...@gm...> 
 wrote:
> Hi All
> 
> I had a problem installing matplotlib 1.0.0 on MacOS X 10.6 using python.org 
> 2.6.5 with the binary installer (dmg). When importing pylab, datautils was 
> missing. I fixed that by easy_installing python-dateutils, but it seems like 
> it should be included in the installer or listed in the install requirements.
> 
> Thanks for a great piece of software!
> 
> -Ed
> 
> 
> 
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I built the installer without dateutil and pytz packages.
At John Hunter's request I made new installers that do install these 
packages. I believe the new installers are now being served, so try 
downloading the installer and running it again.
Beware: the new installer always installs the versions it has; if you 
have a newer pytz or dateutil you want to keep, reinstall it afterwards 
or move it out of site-packages during the matplotlib install.

In article <A94...@tu...>,
 Shir Livne <shi...@tu...> wrote:
> Hi,
> 
> I downloaded the files from the site, but when i type "import 
> matplotlib" in python, it responds with "ImportError: No module named 
> matplotlib"
> 
> Does anyone mind going through the download steps for me? I probably 
> forgot something simple.
What file did you download?
If it was a binary installer, then which python are you using (open a 
Terminal and type "which python"). You should see a path starting with 
/Library, NOT with /System/Library.
If the path starts with /System/Library then that explains your problem: 
you are using the built-in python instead of the python from python.org 
(though the binary *may* work with other 3rd party pythons as well, e.g. 
Enthought or ActiveState).
So, the steps are:
- Download and install a suitable python from <http://python.org> (I 
recommend 2.6.x, but 2.5.x is also fine; we don't have a matplotlib 
binary for 2.7 yet because it is so new)
- Download and install the matching matplotlib Mac binary (for Python 
2.5 or 2.6).
Regards,
-- Russell

On Thu, Jul 8, 2010 at 5:50 AM, Karianne Holhjem
<kar...@as...> wrote:
> Hi,
>
> I'm having trouble getting pyplot and pylab to work on my Mac v.10.4.11
> (Tiger). I've tried searching in both google and different macusers
> forums, but haven't found an answer to my problems. If I have overlooked a
> webpage please send me a link to the solution.
>
> To download matplotlib I have downloaded the dmg package from the official
> matplotlib page
> http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0/http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0/
>
> and it seems to install fine. However, I cannot use neither pyplot nor
> pylab:
You're on the right track with the debugging information you are
trying to provide. One problem is in your script bla.py. You do
 import matplotlib as mpl
 import mpl.pyplot
 import mpl.pylab
but you need to do
 import matplotlib as mpl
 import matplotlib.pyplot
 import matplotlib.pylab
This won't fix your segfault, but it may help you get get better
debugging information.
My first guess is a numpy version conflict -- what version are you
running? You can check the version requirements of the OSX installer
in the README that is provides. Many recent versions of numpy are not
ABI compatible, unfortunately.
JDH

On Sun, Jul 4, 2010 at 8:38 PM, Benjamin Root <ben...@ou...> wrote:
> Jeremy,
>
> The pcolor function can take a vmin and a vmax parameter if you wish to
> control the colorscaling. In addition, you can use a special array
> structure called a "masked array" to have pcolor ignore "special" values.
> Assuming your data is 'vals':
>
> vals_masked = numpy.ma.masked_array(vals, vals == 0.0)
>
> Note that depending on your situation, doing an equality with with a
> floating point value probably isn't very reliable, so be sure to test and
> modify to suit your needs. 'vals_masked' can then be passed to pcolor
> instead of vals.
Yes, I think this is exactly what I need. Thanks!
Jeremy

Caught by the default Reply-to...
---------- Forwarded message ----------
From: Scott Sinclair <sco...@gm...>
Date: 8 July 2010 13:46
Subject: Re: [Matplotlib-users] plotting irregular spaced data
To: Ross Williamson <ros...@gm...>
>On 8 July 2010 00:15, Ross Williamson <ros...@gm...> wrote:
> I have a set of 2d data (2d array) z
> (100x100) which I need to plot - I have a nominal set of x and y
> positions say:
>
> x = linspace(0,100)
> y = linspace(0,100)
>
> Now the actual positions of the points in z are given by the following:
>
> u,v = meshgrid(x,y)
>
> phi = arctan2(v,u)
> theta = arcsin(u/cos(phi))
>
> so I have three 2d arrays (100x100) which describe the postion
> (phi,theta) of the points in z
>
> How do I go about plotting these say using imshow?
If your z are actually values at points in (phi, theta), you might
find it easier to use scatter().
>>> import matplotlib.pyplot as plt
>>> plt.scatter(phi.ravel(), theta.ravel(), c=z.ravel(), edgecolors='none')
>>> plt.colorbar()
Cheers,
Scott

Hi,
I'm having trouble getting pyplot and pylab to work on my Mac v.10.4.11 
(Tiger). I've tried searching in both google and different macusers 
forums, but haven't found an answer to my problems. If I have overlooked a 
webpage please send me a link to the solution.
To download matplotlib I have downloaded the dmg package from the official 
matplotlib page
http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0/http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0/
and it seems to install fine. However, I cannot use neither pyplot nor 
pylab:
[kariannelap:~] karianne% python
Python 2.5.2 (r252:60911, Feb 22 2008, 07:57:53)
[GCC 4.0.1 (Apple Computer, Inc. build 5363)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib as mpl
>>> import mpl.pyplot
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
ImportError: No module named mpl.pyplot
>>> import mpl.pylab
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
ImportError: No module named mpl.pylab
>>> import pylab
Bus error
I tried the clean rebuild and reinstall described on this page:
http://matplotlib.sourceforge.net/faq/installing_faq.html#cleanly-rebuild-and-reinstall-everything
and re-installed without any change. So then I tried deleting all
matplotlib and pylab files and dirs and re-installed, again without
results. I also tried this installation method without success
easy_install matplotlib
Processing matplotlib
error: Not a recognized archive type: matplotlib
Some more info:
[kariannelap:~] karianne% uname -a
Darwin karianneholhjem.local 8.11.1 Darwin Kernel Version 8.11.1: Wed Oct 10 18:23:28 PDT 2007; root:xnu
-792.25.20~1/RELEASE_I386 i386 i386
[kariannelap:~] karianne% python -c 'import matplotlib; print 
matplotlib.__version__'
1.0.0
Regarding the matplotlibrc file I have tried both the default
backend : TkAgg
as well as
backend : WxAgg
since some webpages indicated that might be a problem.
Finally, I wrote a little script called bla.py
import matplotlib as mpl
import mpl.pyplot
import mpl.pylab
and ran it
[kariannelap:~] karianne% python bla.py --verbose-helpful
$HOME=/Users/karianne
CONFIGDIR=/Users/karianne/.matplotlib
matplotlib data path 
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matpl
otlib/mpl-data
loaded rc file 
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/
mpl-data/matplotlibrc
matplotlib version 1.0.0
verbose.level helpful
interactive is False
units is False
platform is darwin
Traceback (most recent call last):
 File "bla.py", line 2, in <module>
 import mpl.pyplot
ImportError: No module named mpl.pyplot
When commenting out line 2 in the scrip this is the output I got:
$HOME=/Users/karianne
CONFIGDIR=/Users/karianne/.matplotlib
matplotlib data path 
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matpl
otlib/mpl-data
loaded rc file 
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/
mpl-data/matplotlibrc
matplotlib version 1.0.0
verbose.level helpful
interactive is False
units is False
platform is darwin
Traceback (most recent call last):
 File "bla.py", line 3, in <module>
 import mpl.pylab
ImportError: No module named mpl.pylab
Can someone please tell me what I am doing wrong or which files I should 
delete to make this work? I have had bad experiences with fink so I prefer 
not using it.
cheers,
Karianne

Thanks that was it.
Cleared it all out and installed tk-dev.
Then it came up with a error about unable to find -ltk8.5. Checked whether I
had tk8.5 installed and that was fine so I installed tk8.5-dev.
Cleaned again recompiled and it all seems to be fine.
Thanks
>

>On 7 July 2010 19:02, Eric Firing <ef...@ha...> wrote:
> On 07/07/2010 05:01 AM, Benjamin Root wrote:
>> Samuel,
>>
>> Fortunately, matplotlib keeps all of the files that it compiles with the
>> python files that it installs. On Ubuntu, I believe that the
>> installation directory was /usr/lib/python2.?/dist-packages/matplotlib*
>
> ubuntu 8.04 was still using site-packages; the switch to dist-packages
> was in 9.10, if I remember correctly. 8.04 uses python 2.5.
>
> Also check the /usr/local path along with the /usr path. I'm not sure
> whether the installation from source put things by default in /usr or
> /usr/local.
You can check where your matplotlib is installed with
$ python -c "import matplotlib; print matplotlib"
Cheers,
Scott