matplotlib-users Mailing List for matplotlib

Building matplotlib requires linking against libpng and freetype.  The
error you posted is just saying that libpng can't be found.  Building
matplotlib correctly on osx and windows isn't for the feint of heart.
Have you tried the pre-built osx binaries available for download on
sourceforge?

Charlie

On 10/9/06, R. Padraic Springuel <R.S...@um...> wrote:
> I'm in the process of migrating from Windows to Mac OS X and doing my
> first round of installations from source code in the process.  In trying
> to install matplotlib I get the following error:
>
> /usr/bin/ld: for architecture i386
> /usr/bin/ld: can't locate file for: -lpng
> collect2: ld returned 1 exit status
> /usr/bin/ld: for architecture ppc
> /usr/bin/ld: can't locate file for: -lpng
> collect2: ld returned 1 exit status
> lipo: can't open input file: /var/tmp//ccG7JjGi.out (No such file or
> directory)
> /usr/bin/ld: for architecture i386
> /usr/bin/ld: can't locate file for: -lpng
> collect2: ld returned 1 exit status
> /usr/bin/ld: for architecture ppc
> /usr/bin/ld: can't locate file for: -lpng
> collect2: ld returned 1 exit status
> lipo: can't open input file: /var/tmp//ccG7JjGi.out (No such file or
> directory)
> error: Command "g++ -arch i386 -arch ppc -isysroot
> /Developer/SDKs/MacOSX10.4u.sdk -g -bundle -undefined dynamic_lookup
> build/temp.macosx-10.3-fat-2.5/src/_tkagg.o
> build/temp.macosx-10.3-fat-2.5/CXX/cxx_extensions.o
> build/temp.macosx-10.3-fat-2.5/CXX/cxxsupport.o
> build/temp.macosx-10.3-fat-2.5/CXX/IndirectPythonInterface.o
> build/temp.macosx-10.3-fat-2.5/CXX/cxxextensions.o -L/usr/lib -L/usr/lib
> -lpng -lz -lstdc++ -lm -lfreetype -lz -lstdc++ -lm -o
> build/lib.macosx-10.3-fat-2.5/matplotlib/backends/_tkagg.so -framework
> Tcl -framework Tk" failed with exit status 1
>
> Can anyone tell this novice Mac installer what this means and how to go
> about fixing it?
> --
>
> R. Padraic Springuel
> Teaching Assistant
> Department of Physics and Astronomy
> University of Maine
> Bennett 309
> Office Hours: Wednesday 2-3pm
>
> -------------------------------------------------------------------------
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>

I mean in the original data format, without any characters like "[],"
Thanks

Bonjour François!

Take it easy.

rc("lines", markeredgewidth=4)

There is no reasons to put cycle inside you code.

Regards, 

On Sunday 08 October 2006 12:08, François Beaubert wrote:
> Le Vendredi 6 Octobre 2006 19:59, John Hunter a écrit :
> > for line in ax.get_xticklines():
> >     line.set_linewidth(2.0)
>
> Thanks !
> I have try this as in examples/axes_props.py but it doesn't work for me
>
> from pylab import *
>
> t = arange(0.0, 2.0, 0.01)
> s = sin(2*pi*t)
> ax = subplot(111)
> ax.plot(t, s)
> ax.grid(True)
>
> ticklines = ax.get_xticklines()
> ticklines.extend( ax.get_yticklines() )
>
> for line in ticklines:
>     line.set_linewidth(4)
>
> show()
>
> any ideas ? I use matplotlib-0.87.5 and Python 2.4.3
> Is there a way to do this in matplotlibrc like for tick length ?

On Monday 09 October 2006 12:45, John Hunter wrote:
> >>>>> "A" == A S Budden <ab...@gm...> writes:
>
>     A> Dear all, I've just started using matplotlib for some data
>     A> processing and plotting and have ported one of my existing
>     A> Matlab scripts to python.  However, I have been unable to get
>     A> the following working properly in python.  In Matlab, this
>     A> works:
>
> Have you tried \prime ?

Al, if you have latex/ghostscript/dvipng on your system, you can set 
text.usetex = True in your rc settings, and you will get the results you 
expect. See http://www.scipy.org/Cookbook/Matplotlib/UsingTex for more 
information.

Darren

P.S.: It looks like this is somewhat improved with mathtext2, which is still 
in development.

>>>>> "A" == A S Budden <ab...@gm...> writes:

    A> Dear all, I've just started using matplotlib for some data
    A> processing and plotting and have ported one of my existing
    A> Matlab scripts to python.  However, I have been unable to get
    A> the following working properly in python.  In Matlab, this
    A> works:

Have you tried \prime ?

JDH

Dear all,

I've just started using matplotlib for some data processing and
plotting and have ported one of my existing Matlab scripts to python.
However, I have been unable to get the following working properly in
python.  In Matlab, this works:

xlabel('Normalised \psi''''_x', 'Interpreter', 'tex')

(The 'Interpreter', 'tex' bit is unnecessary if
'DefaultTextInterpreter' is set to 'tex')

However, the translation into matplotlib doesn't work:

xlabel(r"$\rm{Normalised}\ \psi''_x$")

I've also tried some other variations such as:

xlabel(r'$\rm{Normalised}\ \psi\'\'_x$') or
xlabel(r'$\rm{Normalised}\ \psi_x\'\'$') etc

The single quotes do not appear in the label.  Is this just a
limitation of matplotlib, or is there some way to work around it?

Many thanks in advance,

Al

Hi all,
after some searches, I have fixed some r_ticks problems on polaraxes, then I 
send you the new version of the windrose file, which I hope bugs are removed.
You can now make two types of plot, bar and fill, and play with the resulting 
table of events,in number of counts or in percentage.
Usage:
import windrose
freq,ax=windrose.windplot(speed_array,direction_array,counts=False,speed_classes=[1,2,3,4,5],sectors=18,style='bar')

Hope someones use it :-)

PS: Sorry if my english is bad
-- 
Lionel Roubeyrie - lro...@li...
LIMAIR
http://www.limair.asso.fr

I'm in the process of migrating from Windows to Mac OS X and doing my 
first round of installations from source code in the process.  In trying 
to install matplotlib I get the following error:

/usr/bin/ld: for architecture i386
/usr/bin/ld: can't locate file for: -lpng
collect2: ld returned 1 exit status
/usr/bin/ld: for architecture ppc
/usr/bin/ld: can't locate file for: -lpng
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccG7JjGi.out (No such file or 
directory)
/usr/bin/ld: for architecture i386
/usr/bin/ld: can't locate file for: -lpng
collect2: ld returned 1 exit status
/usr/bin/ld: for architecture ppc
/usr/bin/ld: can't locate file for: -lpng
collect2: ld returned 1 exit status
lipo: can't open input file: /var/tmp//ccG7JjGi.out (No such file or 
directory)
error: Command "g++ -arch i386 -arch ppc -isysroot 
/Developer/SDKs/MacOSX10.4u.sdk -g -bundle -undefined dynamic_lookup 
build/temp.macosx-10.3-fat-2.5/src/_tkagg.o 
build/temp.macosx-10.3-fat-2.5/CXX/cxx_extensions.o 
build/temp.macosx-10.3-fat-2.5/CXX/cxxsupport.o 
build/temp.macosx-10.3-fat-2.5/CXX/IndirectPythonInterface.o 
build/temp.macosx-10.3-fat-2.5/CXX/cxxextensions.o -L/usr/lib -L/usr/lib 
-lpng -lz -lstdc++ -lm -lfreetype -lz -lstdc++ -lm -o 
build/lib.macosx-10.3-fat-2.5/matplotlib/backends/_tkagg.so -framework 
Tcl -framework Tk" failed with exit status 1

Can anyone tell this novice Mac installer what this means and how to go 
about fixing it?
-- 

R. Padraic Springuel
Teaching Assistant
Department of Physics and Astronomy
University of Maine
Bennett 309
Office Hours: Wednesday 2-3pm

Hi,

some times ago I saw that the rgb color was not working anymore, the hexa c=
ode=20
yes but not the rgb.

markerfacecolor=3D(120,120,120,)

retrun this error:

ValueError: to_rgb: Invalid rgb arg "(120, 120, 120)"
to_rgb: Invalid rgb arg "(120, 120, 120)"

but:

markerfacecolor=3D'#888888'

is working fine

I send a mail, I don't remember if I had time to post a bug report. Perhaps=
 is=20
it link?

N.

Le dimanche 8 octobre 2006 15:49, Eric Firing a =E9crit=A0:
> Stefan,
>
> Thanks for the bug report--it is surprising that no one noticed this
> earlier.  It looks like Norbert's changes completely wiped out the
> setting of markerfacecolor and markeredgecolor.  I have reverted axes.py
> in svn to the 2788 revision (via revision 2799) so that it will work
> until Norbert gets a chance to add marker handling back into his patch
> and reapply it.
>
> Eric
>
> Stefan van der Walt wrote:
> > Hi all
> >
> > The marker behaviour changed in
> >
> > ------------------------------------------------------------------------
> > r2790 | nnemec | 2006-09-29 11:46:57 +0200 (Fri, 29 Sep 2006) | 1 line
> >
> > reworked linestyle and markercolor handling
> >
> >
> > For example, try the following:
> >
> > N.plot(N.random.random(1000),'r.')
> >
> > Note that all the dots are blue!
>
> -------------------------------------------------------------------------
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DEVDEV
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> Any change you could share back with the community
the approach
> you followed - web framework used?  integration
strategy?  deploy-
> ment and setup issues?  graph creation methodology?

web framework used: cherrypy
deploymnet os: ubuntu
setup issues: none

> I am looking to tackle a project with multi-chart
reporting 
> component features and would really love to use
Matplotlib
> with it.... but am not quite sure where to start. 

matplotlib comes with a lot of examples and that's
probably the best
place to start. There is an example for how to  save
charts to a file
(which is what I do) and another one for streaming the
charts back to
the user.

The only issue I have faced is that matplotlib is slow
for my chart types (takes about 0.8 seconds to do a
chart). I'm hoping that future version of matplotlib
will be faster. 

Guys at stockcharts.com generate charts in about 0.3
seconds. So matplotlib (for the charts I generate) is
about 2.5 slower than what they use. For most people
that might not be an issue, but since I pre-generate
100,000s of graphs daily it can cause a lot of pain. 

Vineet
 

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> Any change you could share back with the community the approach
> you followed - web framework used?  integration strategy?  deploy-
> ment and setup issues?  graph creation methodology?

web framework used: cherrypy
deploymnet os: ubuntu
setup issues: none

> I am looking to tackle a project with multi-chart reporting 
> component features and would really love to use Matplotlib
> with it.... but am not quite sure where to start. 

matplotlib comes with a lot of examples and that's probably the best
place to start. There is an example for how to  save charts to a file
(which is what I do) and another one for streaming the charts back to
the user.

The only issue I have faced is that matplotlib is slow for my chart
types (takes about 0.8 seconds to do a chart). I'm hoping that future
version of matplotlib will be faster. 

Vineet
 

Hi

If you are on ubuntu you may check out Andrew Straw's  repository:
http://debs.astraw.com

Arnar


On 10/4/06, ah...@cs... <ah...@cs...> wrote:
>
> Hi,
>
> I am trying to compile matplotlib in order to use numpy as the numerix
> option. I can apt-get a version of it which works, but it does not seem to
> support numpy.
>
> I also compiled numpy-1.0rc1 (released 2 weeks ago), and it works fine in
> python. However, when I import matplotlib (0.87.6), I get the error
> message below. A quick internet search suggests to me that it is some kind
> of mismatch in libraries, possibly caused by compiler differences in g++ 4
>
> (numpy at least seems to use g++.. so I tried a different g++ version,
> but it made no difference).
>
> Does someone have an idea what the problem is, or what I could try?
>
> Thanks,
> Allan
>
> --------------------------------
>
> The import of the numpy version of the _transforms module,
> _ns_transforms, failed.  This is is either because numpy was
> unavailable when matplotlib was compiled, because a dependency of
> _ns_transforms could not be satisfied, or because the build flag for
> this module was turned off in setup.py.  If it appears that
> _ns_transforms was not built, make sure you have a working copy of
> numpy and then re-install matplotlib. Otherwise, the following
> traceback gives more details:
>
> Traceback (most recent call last):
>   File "/usr/bin/ipython", line 28, in ?
>     IPython.Shell.start().mainloop()
>   File "/usr/lib/python2.4/site-packages/IPython/Shell.py", line 883, in
> start
>     return shell()
>   File "/usr/lib/python2.4/site-packages/IPython/Shell.py", line 810, in
> __init__
>
>     IPShellGTK.__init__(self,argv,user_ns,debug,shell_class=MatplotlibMTShell)
>   File "/usr/lib/python2.4/site-packages/IPython/Shell.py", line 618, in
> __init__
>     on_kill=[mainquit])
>   File "/usr/lib/python2.4/site-packages/IPython/ipmaker.py", line 85, in
> make_IPython
>     IP = shell_class('__IP',user_ns=user_ns,**kw)
>   File "/usr/lib/python2.4/site-packages/IPython/Shell.py", line 500, in
> __init__
>     user_ns,b2 = self._matplotlib_config(name)
>   File "/usr/lib/python2.4/site-packages/IPython/Shell.py", line 373, in
> _matplotlib_config
>     from matplotlib import backends
>   File "/usr/lib/python2.4/site-packages/matplotlib/backends/__init__.py",
>
> line 55, in ?
>     new_figure_manager, draw_if_interactive, show = pylab_setup()
>   File "/usr/lib/python2.4/site-packages/matplotlib/backends/__init__.py",
> line 23, in pylab_setup
>     globals(),locals(),[backend_name])
>   File
> "/usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtkagg.py",
> line 8, in ?
>     from matplotlib.figure import Figure
>   File "/usr/lib/python2.4/site-packages/matplotlib/figure.py", line 5, in
> ?
>     from artist import Artist
>   File "/usr/lib/python2.4/site-packages/matplotlib/artist.py", line 4, in
> ?
>     from transforms import identity_transform
>   File "/usr/lib/python2.4/site-packages/matplotlib/transforms.py", line
> 223, in ?
>     from _transforms import Value, Point, Interval, Bbox, Affine
>   File "/usr/lib/python2.4/site-packages/matplotlib/_transforms.py", line
> 17, in ?
>     from matplotlib._ns_transforms import *
> ImportError:
> /usr/lib/python2.4/site-packages/matplotlib/_ns_transforms.so: undefined
> symbol: _ZNSt24__default_alloc_templateILb1ELi0EE8allocateEj
>
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share
> your
> opinions on IT & business topics through brief surveys -- and earn cash
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>

Hi all,
I have found some bugs in my previous windrose plotter posted here, then I try 
to remove them and set some improvements. Now I have a problem with rgrids 
labels on polar axes, they disappear after a draw() command, and when I use 
Rectangle on a polar axes, theview is not scaled, I have to make a draw() 
(and rgrids labels go away :-( ).
-- 
Lionel Roubeyrie - lro...@li...
LIMAIR
http://www.limair.asso.fr

Hi,

I'm trying to create an image on screen, and update it with new data. It
works to have the data added, but my images keep showing the old data.

I'm plotting sin(x) through the time, and every .5 seconds, I redraw the
image. 
    figure.hold(False)
    a = figure.add_subplot(111)
    t = arange(low,upper,0.01)
    s = sin(2*pi*t)
    a.plot(t,s)

This is called first with low=0, upper=5, then with low=1, upper=6 etc. 
What I want is to see only 5 seconds, with the data moving off on the left
side. However, what I see is that the old data is retained, and the sine is
squeezed more and more. 

Does anyone know how to change this?

Regards,
Chris Niekel

Vineet
 
Looks very good!  Only thing is that when you change search types,
the "working" highlighter should be located near the search form, not
at the page bottom (I missed it the first few times...)
 
Any change you could share back with the community the approach
you followed - web framework used?  integration strategy?  deploy-
ment and setup issues?  graph creation methodology?
 
I am looking to tackle a project with multi-chart reporting 
component features and would really love to use Matplotlib
with it.... but am not quite sure where to start. 
 
Thanks!
Derek

>>> Vinj Vinj <vin...@ya...> 2006/10/06 06:49:19 PM >>>

Hi,

I've been working hard on www.eswap.com. It's
matplotlib powered. I would like to thank the
matplotlib community and especially John H. for making
this possible. Some of the features are:

1. See 20 (professional looking) charts per page
2. You can tag stocks with keywords
3. You can create your own sets and portfolios
4. keyboard navigation. You can use the right arrow
key and left arrow key

Scanning, Modelling and Back Testing are planned for
release early next year. Can you give it a spin and
let me know how you like it?

Thanks,

Vineet

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-------------------------------------------------------------------------
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A quick (an easy?) question:
 
I have a numeric, integer label which I am using for the X-axis.
Numbers start from 1, up to "something large".  When
"something large"  is less than 10,000 the numbers appear
as normal, in 1000 or 2000 interval steps.  However, if the 
"something large" exceeds that, the numbers are formatted 
in exponential notation.
 
ie. 0.2  0.4   0.6... followed by a rather large and ugly-looking
x1e+4
 
which appears on the same line as the X-axis legend.
 
Is there is a simple way to avoid exponential notation?
 
Thanks
Derek

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Le Vendredi 6 Octobre 2006 19:59, John Hunter a =E9crit=A0:=0A=
> for line in ax.get_xticklines():=0A=
> =A0 =A0 line.set_linewidth(2.0)=0A=
=0A=
Thanks !=0A=
I have try this as in examples/axes_props.py but it doesn't work for me=0A=
=0A=
from pylab import *=0A=
=0A=
t =3D arange(0.0, 2.0, 0.01)=0A=
s =3D sin(2*pi*t)=0A=
ax =3D subplot(111)=0A=
ax.plot(t, s)=0A=
ax.grid(True)=0A=
=0A=
ticklines =3D ax.get_xticklines()=0A=
ticklines.extend( ax.get_yticklines() )=0A=
=0A=
for line in ticklines:=0A=
    line.set_linewidth(4)=0A=
=0A=
show()=0A=
=0A=
any ideas ? I use matplotlib-0.87.5 and Python 2.4.3=0A=
Is there a way to do this in matplotlibrc like for tick length ?=0A=
=0A=
=0A=
--=20=0A=
Fran=E7ois BEAUBERT=0A=
ENSIAME/LME=0A=
Bureau A9=0A=
Universit=E9 de Valenciennes - Le Mont Houy - 59313 Valenciennes Cedex 9=0A=
T=E9l=E9phone: (0/33)3 27 51 19 72=0A=
T=E9l=E9copie: (0/33)3 27 51 19 61=0A=
Mel: fra...@un...=0A=
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This message has been scanned for viruses and=0A=
dangerous content by MailScanner, and is=0A=
believed to be clean.=0A=
=0A=

On Monday 02 October 2006 21:51, Mark Bakker wrote:
> What I don't understand is why we need previews at all?
> Is this because Microsoft software cannot display an eps file?
> Why not? Isn't that one of the easiest drivers to write?
> Are they not adding eps format out of spite?
> Mark
Sorry for replying so late - I was to a meeting for a few days.

As to your question: I have no idea WHY previews are needed. I only know they 
are required by some publishers if you submit a paper to them (which was my 
original reason for asking).

HTH
Christian

I posted this on scipy-user ML, then tried here and it bounced (?), so
now I'm trying again. Sigh...

OK, so I can't import pylab, but everything else (import numpy, scipy,
matplotlib and gtk) works fine.

These are installed:
scipy.__version__ returns '0.5.1'
numpy.__version__  returns '1.0rc1'
matplotlib.__version__ returns '0.87.6'

My options in setup.py for matplotlib was set to build Agg and
GTKAgg ( = 1) only, the others all = 0. If I leave them at 'auto' as
per default, matplotlib doesn't build (?). I use Ubuntu Dapper -
AMD64.

Over the weekend I managed to find the cause of the problem: Me.

I set Agg = 1, GTKAgg = 1 and GTK = 1 (the rest = 0) in setup.py and
now the pylab interface is happy. Previously GTK = 0 and it seems
pylab was looking for a shared library that's built if GTK = 1.
--
wh

Hi,

The following generates a plot, but the x axis label is missing. Am I 
doing something wrong? In any case, can anyone suggest a solution or 
workaround?

This has been tested with the version of matplotlib in Debian etch 
(0.87.5).

Thanks in advance.
                                                              Faheem.

********************************************************************
from pylab import *
from matplotlib import rc
from matplotlib.backends.backend_ps import FigureCanvasPS

def plot_ctimevec():
     x = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100]
     y = [45.659999999999997, 60.058999999999997, 67.575000000000003, 78.372,
          84.227000000000004, 88.162000000000006, 85.391999999999996,
          94.572000000000003, 91.572000000000003, 103.40000000000001]
     fig = Figure()
     fig.set_figwidth(6.0)
     fig.set_figheight(3.0)
     canvas = FigureCanvasPS(fig)
     ax = fig.add_subplot("111")
     ax.plot(x, y)
     ax.set_xlabel('dim')
     ax.set_ylabel(r'average of $F+L-1$')
     print x
     print y
     canvas.print_figure("toy_ctimes.eps")

Kelvin,

If you are using the command line interface, try using 'xlim(a, b)' to
set the limits.

 -- Paul

On 10/6/06, Kelvin Chu <kel...@uv...> wrote:
> Hi,
>
> Is it possible in python/matplotlib to only define the x-axis range
> and have the y-axis autoscale?
>
> I've read the docs about axis() but this seems to set the bounds on
> both the x- and y-axes.
>
> Thanks.
>
> Kelvin Chu
>
>
> --
> Kelvin Chu, Physics Department, Cook Building
> 82 University Place, University of Vermont, Burlington, VT 05405-0125
> http://www.uvm.edu/~kchu/; (802) 656-0064; Fax: (802) 656-0817
>
>
>
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