matplotlib-users Mailing List for matplotlib

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>>>>> "Petar" =3D=3D Petar Mari=A7 <pet...@gm...> writes:
 Petar> Hi John, Unfortunately, that also didn't do what I wanted.
 Petar> I tried a different backend today - Cairo, and got the same
 Petar> results
You should then try the svn version of mpl or try the alpha trick I
suggested.
JDH

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On 2006年6月30日, James Carroll apparently wrote:=20
> I gave PyInstaller a try, and it seemed to be smart and easy at first, an=
d=20
> created a single exe that was just 8MB. The problem is that=20
> when I run the exe, It gives me the following errors before it=20
> crashes:=20
> - Fatal Error: MSVCR71.DLL!=20
> - Fatal Error: colud not be extracted.=20
http://pyinstaller.hpcf.upr.edu/cgi-bin/trac.cgi/ticket/36
hth,
Alan Isaac

> Understood. But do not overlook that PyInstaller is really
> the current life of Gordon McMillan's Python Installer,
> so it really is not a new kid on the block.
I gave PyInstaller a try, and it seemed to be smart and easy at first, and
created a single exe that was just 8MB. The problem is that
when I run the exe, It gives me the following errors before it
crashes:
 - Fatal Error: MSVCR71.DLL!
 - Fatal Error: colud not be extracted.
 - Fatal Error: Error loading Python DLL
 - a message box pointing to python24.dll in a temp dir.
 - Fatal Error:
 - "Please tell microsoft about this problem." [Don't send]
moving msvcr71.dll and python24.dll to the same directory
didn't change anything.
I'll put some more time into trying it, but my first impression isn't good.
Meanwhile, I've removed numarray entirely from the project, and am using
matplotlib.rcParams['numerix'] = 'numpy'
and py2exe + nsis is working pretty well. I have a working single
executable that is 12MB, but it takes about 18 seconds to decompress &
run. If I turn off the
NSIS lzw compression, then it it is a 46MB executable, and runs in about 12
seconds.
I might be trying to create my own C++ wxWidgets top level application
and embed wxPython & matplot lib in that. (has anyone ever had luck
doing this?)
Thanks,
-Jim

>>>>> "Zhang" == Zhang Le <zha...@gm...> writes:
 Zhang> Hi, I'm trying to plot a set of points using given RGB
 Zhang> tuples as color: plot([0.5],[0.5], '.', markersize=50,
 Zhang> color=(0.5,0.5,0.5)) there is no error but the point I got
 Zhang> is still blue. Any tips?
markers and lines have different property names.
 plot([0.5],[0.5], '.', markersize=50, markerfacecolor=(0.5,0.5,0.5)) 
the properties that control markers are markerfacecolor,
markeredgecolor and markeredgewidth, with abbreviations mfc, mec and
mew.
JDH

Hi,
 I'm trying to plot a set of points using given RGB tuples as color:
 plot([0.5],[0.5], '.', markersize=50, color=(0.5,0.5,0.5))
 there is no error but the point I got is still blue.
Any tips?
Zhang Le

>>>>> "Petar" =3D=3D Petar Mari=A7 <pet...@gm...> writes:
 Petar> Hi John,
 >> Does fig =3D figure(frameon=3DFalse) do what you want?
 Petar> Apperently not:
 >>>> from pylab import * x =3D range(10) figure(1, frameon=3DFalse,
 >>>> facecolor=3D'r') scatter(x, x) show()
I found the problem in the figure code and fixed it in svn. If you
don't have access to svn, you can manually set the attribute like
 fig =3D figure(1, facecolor=3D'r')
 fig.frameon =3D False
If you have a backend that supports alpha, however, I would recommend
explicitly setting the alpha channel of the figure rectangle over this
approach
 fig.figurePatch.set_alpha(0.0)
JDH

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I downlaoded matplotlib-0.87.3.tar.gz from sourceforge and am attempting
to compile/install it on a RedHat linux installation source. When I run
setup I get the following error.
 
$: python setup.py build
Traceback (most recent call last):
 File "setup.py", line 63, in ?
 from setupext import build_agg, build_gtkagg, build_tkagg,
build_wxagg,\
 File "setupext.py", line 118, in ?
 win32_compiler = get_win32_compiler()
 File "setupext.py", line 115, in get_win32_compiler
 if 'mingw32' in v:
TypeError: 'in <string>' requires character as left operand
 
I'm runing python 2.2.3. libpng, zlib, freetype, and Numeric are all
installed.
Any suggestions are greatly appreciated.
 
 
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>>>>> "Nils" == Nils Wagner <nw...@ia...> writes:
 >> Thanks for the report Nils, fixed in svn.
OK, and this time I actually tested :-)
JDH

John Hunter wrote:
>>>>>> "Nils" == Nils Wagner <nw...@ia...> writes:
>>>>>> 
>
> Nils> I am using the latest svn version of mpl Traceback (most
> Nils> recent call last): File
> Nils> "/usr/lib/python2.4/site-packages/matplotlib/backend_bases.py",
> Nils> line 1562, in zoom widgets.release(self) AttributeError:
> Nils> 'module' object has no attribute 'release'
>
> Thanks for the report Nils, fixed in svn.
>
> JDH
>
> Using Tomcat but need to do more? Need to support web services, security?
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> _______________________________________________
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> Mat...@li...
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> 
Hi John,
Sorry: IndentationError: ('expected an indented block', 
('/usr/lib64/python2.4/site-packages/matplotlib/backend_bases.py', 1222, 
11, ' for a in self.canvas.figure.get_axes():\n'))running 
install_data
Nils

>>>>> "Petar" =3D=3D Petar Mari=A7 <pet...@gm...> writes:
 Petar> Hi all, First of all, thank you for this awesome library,
 Petar> you mad my life heck of a lot easier - no really :)
 Petar> I'm interested into how to remove the whitespace which is
 Petar> around the figure? You can really see it when you export
 Petar> your picture via savefig()
 Petar> Example graph:
 Petar> http://svn.petarmaric.com/playground/trunk/test.png Script
 Petar> source:
 Petar> http://svn.petarmaric.com/playground/trunk/web_graph/views.py
 Petar> I guess this is probably a pretty newbie question, but I'm
 Petar> really not into all of this, I'm just a user trying to make
 Petar> some pretty pictures for a student project :)
Does
 fig =3D figure(frameon=3DFalse)
do what you want?
JDH

I am a new user of matplotlib and am trying to create a "radar" or
"star" plot. I didn't see a convenience function in matplotlib so I am
trying to create it using polar plots.
It would seem straight forward if the fill() function could be used
with polar axes, but my attempts thus far have not worked.
Is it possible to use a polar axis and the fill function, or is there
an easier way of creating "radar/star" plots?
much thanks,
marek

>>>>> "Nils" == Nils Wagner <nw...@ia...> writes:
 Nils> I am using the latest svn version of mpl Traceback (most
 Nils> recent call last): File
 Nils> "/usr/lib/python2.4/site-packages/matplotlib/backend_bases.py",
 Nils> line 1562, in zoom widgets.release(self) AttributeError:
 Nils> 'module' object has no attribute 'release'
Thanks for the report Nils, fixed in svn.
JDH

Hi all,
I am going to visualize mode shapes of L-shaped membranes using contour.
So far, I have two lists xin, yin containing the coordinates of interior 
points (see bottom of mode.png) .
A third list will contain the corresponding displacements u(xin,yin).
 >>> xin
[-0.77777777777777779, -0.77777777777777779, -0.77777777777777779, 
-0.77777777777777779, -0.77777777777777779, -0.77777777777777779, 
-0.77777777777777779, -0.77777777777777779, -0.77777777777777779, 
-0.55555555555555558, -0.55555555555555558, -0.55555555555555558, 
-0.55555555555555558, -0.55555555555555558, -0.55555555555555558, 
-0.55555555555555558, -0.55555555555555558, -0.55555555555555558, 
-0.33333333333333337, -0.33333333333333337, -0.33333333333333337, 
-0.33333333333333337, -0.33333333333333337, -0.33333333333333337, 
-0.33333333333333337, -0.33333333333333337, -0.33333333333333337, 
-0.11111111111111116, -0.11111111111111116, -0.11111111111111116, 
-0.11111111111111116, -0.11111111111111116, -0.11111111111111116, 
-0.11111111111111116, -0.11111111111111116, -0.11111111111111116, 
0.11111111111111116, 0.11111111111111116, 0.11111111111111116, 
0.11111111111111116, 0.11111111111111116, 0.33333333333333326, 
0.33333333333333326, 0.33333333333333326, 0.33333333333333326, 
0.33333333333333326, 0.55555555555555536, 0.55555555555555536, 
0.55555555555555536, 0.55555555555555536, 0.55555555555555536, 
0.77777777777777768, 0.77777777777777768, 0.77777777777777768, 
0.77777777777777768, 0.77777777777777768, 1.0, 1.0, 1.0, 1.0, 1.0]
 >>> yin
[-0.77777777777777779, -0.55555555555555558, -0.33333333333333337, 
-0.11111111111111116, 0.11111111111111116, 0.33333333333333326, 
0.55555555555555536, 0.77777777777777768, 1.0, -0.77777777777777779, 
-0.55555555555555558, -0.33333333333333337, -0.11111111111111116, 
0.11111111111111116, 0.33333333333333326, 0.55555555555555536, 
0.77777777777777768, 1.0, -0.77777777777777779, -0.55555555555555558, 
-0.33333333333333337, -0.11111111111111116, 0.11111111111111116, 
0.33333333333333326, 0.55555555555555536, 0.77777777777777768, 1.0, 
-0.77777777777777779, -0.55555555555555558, -0.33333333333333337, 
-0.11111111111111116, 0.11111111111111116, 0.33333333333333326, 
0.55555555555555536, 0.77777777777777768, 1.0, 0.11111111111111116, 
0.33333333333333326, 0.55555555555555536, 0.77777777777777768, 1.0, 
0.11111111111111116, 0.33333333333333326, 0.55555555555555536, 
0.77777777777777768, 1.0, 0.11111111111111116, 0.33333333333333326, 
0.55555555555555536, 0.77777777777777768, 1.0, 0.11111111111111116, 
0.33333333333333326, 0.55555555555555536, 0.77777777777777768, 1.0, 
0.11111111111111116, 0.33333333333333326, 0.55555555555555536, 
0.77777777777777768, 1.0]
How can I realize this task with mpl ?
help (contour) yields
contour(X,Y,Z) - X,Y specify the (x,y) coordinates of the surface.
 X, Y, and Z must be arrays with the same dimensions.
 Z may be a masked array, but filled contouring may not handle
 internal masked regions correctly.
How do I build X,Y from my lists xin, yin ?
Any pointer would be appreciated.
Nils

Hi,
I'd love to have a backend which outputs skencil .sk files with text rendered
through the skLaTeX plugin. For those who don't know it, skencil is a vector
drawing program written in python. Its skLaTeX plugin allows to include LaTeX
text in the drawing. Right now I'm creating eps files with matplotlib with the
'xpdf' distiller option and convert it to skencil file format with pstoedit
which works but which is not very convenient.
Has anybody already done something like that before? I don't know if I'll find
the time to try it myself. In case not, please accept it as feature request.
Christian

I think this may be what you need
http://matplotlib.sourceforge.net/matplotlib.colors.html#LinearSegmentedColormap
As I recall there are some examples floating around somewhere, perhaps
on the wiki...
Cheers
JP
James Boyle wrote:
> I am interested in producing a color map and accompanying colorbar
> with non-linear (arbitrary) spacing. My intent is like the attached
> color bar in which the increments are monotonic but vary in size.
> There might be an easy way to do this but it is not apparent to me.
>
> --Jim
>
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>

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Ly93d3cucGV0YXJtYXJpYy5jb20vCg==

I am using the latest svn version of mpl
Traceback (most recent call last):
 File "/usr/lib/python2.4/site-packages/matplotlib/backend_bases.py", 
line 1562, in zoom
 widgets.release(self)
AttributeError: 'module' object has no attribute 'release'
Nils
 

John,
They do behave independently. This is about default behavior. Here 
are some examples (unverified), that assume some standard matplotlib 
rc file.
Ex 1:
No color specified.
MPL and matlab result: both line and marker edge have same default color.
Ex 2:
Set the color with the plot command, e.g. 'r+-' string.
matlab result: both marker and line are red.
MPL result: line is red, marker remains default blue.
Ex 3:
Set colors explicitly, e.g. 'ro-', 'markerfacecolor'=[0,1,0]
matlab and MPL result: line is red, marker face is green. I 
**believe** that in MPL the marker edge will remain default blue, 
since it is not set explicitly. In matlab, the marker edge will pick 
up the red line color.
Both approaches are reasonable, one simply has to know what to 
expect. In my case, being somewhat new to MPL, I was quite confused 
by how Ex 2 worked in MPL. Now I know better. The matlab approach 
requires somewhat less typing typically.
-Tony
At 8:23 AM -0500 6/29/06, John Hunter wrote:
> >>>>> "Tony" == Tony Mannucci <Ton...@jp...> writes:
>
> Tony> John, Thanks for the answer.
>
> Tony> My prime mistake was to assume that matlab behavior is
> Tony> mimicked in matplotlib. (I am not saying it should
> Tony> be!). matlab has a Line object and this includes the
> Tony> markers. So, what I called "bugs" was based on a false
> Tony> expectation. The matlab version of the code will produce
> Tony> lines and symbols of the same color.
>
> Tony> I will spend more time with the matplotlib manual and learn
> Tony> the differences with matlab, and make progress that way.
>
>Hmm, I didn't know matlab behaved this way. I know matlab does have
>color, markerfacecolor and margeredgecolor, so I assumed that they
>would be controlled independently. So the behavior is
>
> set(l, 'color', 'red')
>
>and both the linestyle and markercolor are changed?
>
>
>JDH
-- 
Tony Mannucci
Supervisor, Ionospheric and Atmospheric Remote Sensing Group
 Mail-Stop 138-308, Tel > (818) 354-1699
 Jet Propulsion Laboratory, Fax > (818) 393-5115
 California Institute of Technology, Email > Ton...@jp...
 4800 Oak Grove Drive, http://genesis.jpl.nasa.gov
 Pasadena, CA 91109

Hi Jim,
I guess you'd have to write a custom palette dictionnary do to that. If you
already have a GMT file, check the link
www.scipy.org/Cookbook/Matplotlib/Loading_a_colormap_dynamically
You could also take a cpt file you like, see for example
http://pdfb.wiredworkplace.net/cpt-city/www/cb/seq/index.html
tweak it to fit your needs and use the script below to convert it to a
format matplotlib will understand. See the example in the docstring.
David
def cpt2seg(file_name, sym=False, discrete=False):
 """Reads a .cpt palette and returns a segmented colormap.
 sym : If True, the returned colormap contains the palette and a mirrored
copy.
 For example, a blue-red-green palette would return a
blue-red-green-green-red-blue colormap.
 discrete : If true, the returned colormap has a fixed number of uniform
colors.
 That is, colors are not interpolated to form a continuous range.
 Example :
 >>> _palette_data = cpt2seg('palette.cpt')
 >>> palette = matplotlib.colors.LinearSegmentedColormap('palette',
_palette_data, 100)
 >>> imshow(X, cmap=palette)
 Licence: MIT
 Author: David Huard, 2006
 """
 dic = {}
 f = open(file_name, 'r')
 rgb = read_array(f)
 rgb = rgb/255.
 s = shape(rgb)
 colors = ['red', 'green', 'blue']
 for c in colors:
 i = colors.index(c)
 x = rgb[:, i+1]
 if discrete:
 if sym:
 dic[c] = zeros((2*s[0]+1, 3), float)
 dic[c][:,0] = linspace(0,1,2*s[0]+1)
 vec = concatenate((x ,x[::-1]))
 else:
 dic[c] = zeros((s[0]+1, 3), float)
 dic[c][:,0] = linspace(0,1,s[0]+1)
 vec = x
 dic[c][1:, 1] = vec
 dic[c][:-1,2] = vec
 else:
 if sym:
 dic[c] = zeros((2*s[0], 3), float)
 dic[c][:,0] = linspace(0,1,2*s[0])
 vec = concatenate((x ,x[::-1]))
 else:
 dic[c] = zeros((s[0], 3), float)
 dic[c][:,0] = linspace(0,1,s[0])
 vec = x
 dic[c][:, 1] = vec
 dic[c][:, 2] = vec
 return dic
2006年6月29日, James Boyle <bo...@ll...>:
>
> I am interested in producing a color map and accompanying colorbar with
> non-linear (arbitrary) spacing. My intent is like the attached color
> bar in which the increments are monotonic but vary in size. There might
> be an easy way to do this but it is not apparent to me.
>
> --Jim
>
>
>
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job
> easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>
>
>

On 2006年6月29日, James Carroll wrote: 
> PyInstaller looks intriguing, but the traffic on their 
> mailing list makes me think that it doesn't have enough 
> users (& therefore developers) yet. I want to stay on the 
> well-traveled-paths where I can find them. 
Understood. But do not overlook that PyInstaller is really
the current life of Gordon McMillan's Python Installer,
so it really is not a new kid on the block.
Cheers,
Alan Isaac

I am interested in producing a color map and accompanying colorbar with 
non-linear (arbitrary) spacing. My intent is like the attached color 
bar in which the increments are monotonic but vary in size. There might 
be an easy way to do this but it is not apparent to me.
--Jim

> > My final distribution is 47MB in 840 files. Does anyone
> > have an example that does even better?
>
> I think PyInstaller is supposed to help with this problem:
> http://pyinstaller.hpcf.upr.edu/
> But I have not used it.
>
> Cheers,
> Alan Isaac
Hi Alan, PyInstaller looks intriguing, but the traffic on their
mailing list makes me think that it doesn't have enough users (&
therefore developers) yet. I want to stay on the well-traveled-paths
where I can find them.
I think for now I'll use NSIS w/ py2exe to create a single executable
that unpacks to a temporary directory and launches itself when it's
double clicked. I've used this sucessfully in the past. ( something
like this: http://wiki.wxpython.org/index.cgi/SmallApp )
I think what I'm really hoping for is to find a way to include just
the core functionality of matplotlib, without pulling in numpy and
scipy and all the bells and whistles.
Of course, the real solution to my problem is to just start using all
the bells and whistles (I'm happy to see the mathtext module that will
work on systems that don't have TeX!)
-Jim
On 6/28/06, Alan G Isaac <ai...@am...> wrote:
> On 2006年6月28日, James Carroll apparently wrote:
>
>
>
>
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>