matplotlib-users Mailing List for matplotlib

Daniel Fish wrote:
> In response to revision number 3641 (bar plotting patch by Michael 
> Forbes (link below): Inside axes.py, the function 'hlines' is missing 
> the line "coll.update(kwargs)" found in the analogous function 'vlines', 
> so the horizontal linewidth kwarg does not update.
Thank you. It is now fixed in 3715.
Eric

Hi,
What's the equivalent command in matplotlib to matlab's "surf"? I
assume it's Axes3D.plot_surface. But this doesn't see to work. The
code to be ported is:
s = surf(linspace(0,2,100), linspace(-1,1,100), fe');
But in matplotlib I've come up with:
terrain = R.randn(100, 100) / 1
nbumps = 20
f = lambda x: [int(v) for v in x]
bumpsx = 100 * R.rand(1, nbumps)
bumpsx = map(f, bumpsx.round())
bumpsy = 100 * R.rand(1, nbumps)
bumpsy = map(f, bumpsy.round())
f = lambda x: [abs(v) for v in x]
terrain[bumpsx, bumpsy] = map(f, abs(R.randn(1, nbumps))) # TODO:
abs(randn(nbumps, nbumps))
f = lambda x, y: I.lfilter((N.ones((1, x,)) / x)[0], 1, y)
fterrain = (f(20, f(15, terrain).conj().T)).conj().T
x = N.linspace(0, 2, 100)
y = N.linspace(-1, 1, 100)
z = fterrain
surface = axes3d.plot_surface(x, y, z)
The problem is that x, y, and z all should have the same shape (or at
least I assume from the simple3d.py example). But in what's above, x
and y have a shape of (100,), and z has a shape of (100,100). What
should I do instead?
I'm more than happy to share all the source code if that would be
instructive. Thanks.
-Tom

hi Matthieu,
this will work too, with setp instead of set. Clearly 'set' is now 
reserved. Someone should update the user's guide.....
best,
Johann
> ----------------------------------------------------------------------
>
> Message: 1
> Date: 2007年8月16日 18:27:33 +0200
> From: "Matthieu Brucher" <mat...@gm...>
> Subject: Re: [Matplotlib-users] problem with set in current svn HEAD
> To: Mat...@li...
> Message-ID:
> 	<e76...@ma...>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
>
> I think you must type :
> set(gca(), 'xticklabels', [])
>
> Matthieu
>
> 

In response to revision number 3641 (bar plotting patch by Michael =
Forbes (link below): Inside axes.py, the function 'hlines' is missing =
the line "coll.update(kwargs)" found in the analogous function 'vlines', =
so the horizontal linewidth kwarg does not update.
http://matplotlib.svn.sourceforge.net/viewvc/matplotlib/trunk/matplotlib/=
lib/matplotlib/axes.py?view=3Dmarkup&pathrev=3D3641

Unfortunately, I think that is a known bug in 0.90.0. This is fixed in SVN, if you're able to use it.
Cheers,
Mike

I've been trying to install matplotlib with interactive plotting
support on a non-standard linux distribution (sidious.isani.org). I
have successfully installed matplotlib 0.90.1 with python 2.4.3 and
IPython 0.7.2. I can make plots with any of the image backends, but
the TkAgg backend fails with an "undefined symbol" error.
To install with TkAgg support I edited setup.py as follows:
BUILD_AGG = 1
BUILD_GTKAGG = 0
BUILD_GTK = 0
BUILD_TKAGG = 1
I run the build and install steps as root, getting no errors. If I
set the backend to Agg I can produce pdf or png plots just fine.
However, when I try to import the TkAgg backend, I get the following
error:
Traceback (most recent call last):
 File "<stdin>", line 1, in ?
 File "/usr/lib/python2.4/site-packages/pylab.py", line 1, in ?
 from matplotlib.pylab import *
 File "/usr/lib/python2.4/site-packages/matplotlib/pylab.py", line 222, in ?
 new_figure_manager, draw_if_interactive, show = pylab_setup()
 File "/usr/lib/python2.4/site-packages/matplotlib/backends/__init__.py",
line 24, in pylab_setup
 globals(),locals(),[backend_name])
 File "/usr/lib/python2.4/site-packages/matplotlib/backends/backend_tkagg.py",
line 8, in ?
 import tkagg # Paint image to Tk photo blitter extension
 File "/usr/lib/python2.4/site-packages/matplotlib/backends/tkagg.py",
line 1, in ?
 import _tkagg
ImportError: /usr/lib/python2.4/site-packages/matplotlib/backends/_tkagg.so:
undefined symbol: XSetInputFocus
(I get the same error when testing as root or with my own user account)
This looks to me like a linker error. Maybe the xlib library is not
properly linked? I've checked that xsetinputfocus appears in
/usr/X11R7/include/X11/Xlib.h and I have added this directory to
setupext.py as:
basedir = {
 'win32' : ['win32_static',],
 'linux2' : ['/usr/local', '/usr','/usr/X11R7/include/X11',],
 'linux' : ['/usr/local', '/usr','/usr/X11R7/include/X11',],
Is there some other file I should be locating and linking, or some
other way to include xlib?
Thanks,
-steve