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> I still hope somebody more expert will discover a less ugly, more  
> general,
> and less fragile solution.

Would using macports be an acceptable/less fragile solution for you?

My matplotlib (and pretty much everything) install via macports  
survived my Tiger -> Leopard upgrade (I did an archive install) just  
fine.

Its dependency stuff requires you to intsall numpy via macports as  
well, but I think what I did was (long time ago now):

$ sudo port install py-matplotlib

To get everything up and running. At some later point I uninstalled py- 
numpy and py-matplotlib (it kept the rest of the dependencies) and  
have since been compiling them from svn.

Everything seems to be working well for me.

> Also, with plain python, you don't get the ">>>" prompt back 'till  
> you close
> the figure window, whereas with pythonw you get it back as soon as the
> figure's displayed.
> That last is important to me, because it replicates the (to me)  
> single moust
> useful thing about ipython. That means I *don't* need to install  
> ipython,
> now.

I find ipython to be indispensable for many more reasons than just  
that. For instance, I just (relatively) recently was made aware of the  
"%debug" trick that will drop you into where your last Error was  
raised if your script bombs out so that you can poke around to see  
what went wrong. So cool ... but, hey, whatever floats your boat :-)

-steve

sec6 wrote:
> 
> sent to:  mat...@li...
> 
> I'm attempting to install matplotlib under version 10.5 ("Leopard") of  
> the Macintosh operating system.
> 
> I had an old installation, via Fink, which broke when I (foolishly)  
> upgraded from version 10.4 to version 10.5.
> 
> In principle, installing matplotlib under 10.5 should be simple,  
> because Leopard already includes all of matplotlib's dependencies:
> 	Python 2.4 (and 2.5)
> 	numpy
> 	libpng
> 	zlib
> 	freetype
> 	
> In practice, I seem to be running into trouble with freetype.
> 
> ...snip...
> 
> I am going to try some monkey business along the lines of
> 	ln /usr/X11/lib/libfreetype.6.dylib /sw/lib/freetype219/lib/ 
> libfreetype.6.dylib
> and will let you know the results.  However, even if that works, it's  
> a heinous kluge, and probably fragile, too.
> 
> 

Jed's solution (bootstrap Fink from scratch) didn't work for me (Bootstrap
worked OK, but installing matplotlib  failed with "Could not resolve
inconsistent dependencies!")

However, I have now tried the "monkey business" alluded to above, and it was
successful.
#Start by launching XWindows. now:
	cd /sw/lib/freetype219/lib
	sudo ln -s /usr/X11/lib/libfreetype.6.dylib ./libfreetype.6.dylib
	<...enters password...>
	cd ~
	pythonw2.5
	>>> import pylab
#Bingo!  no error.
	>>> fig = pylab.figure()
#Empty window appears on screen.
	>>> pylab.plot([1,2,3],[1,2,3])
	[<matplotlib.lines.Line2D instance at 0x163e558>]
#Correct plot appears in window
	>>> fig.savefig('/Users/username/Desktop/temp.ps')
#Open temp.ps in a graphics program (Canvas, as it happens). Looks good.

Using pythonw, rather than python, is important.
With pythonw, pylab.figure() displays the figure, whereas with plain python,
the figure doesn't display untill you do pylab.show().
Also, with plain python, you don't get the ">>>" prompt back 'till you close
the figure window, whereas with pythonw you get it back as soon as the
figure's displayed.
That last is important to me, because it replicates the (to me) single moust
useful thing about ipython. That means I *don't* need to install ipython,
now.

I still hope somebody more expert will discover a less ugly, more general,
and less fragile solution.



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Thanks John,

> I think you misread the warning on hlines.
Indeed. Problem solved.

> This error typically arises when the CXX extension code is expecting a
> sequence but getting something different.  I can't reproduce it here,
> but I am running mpl svn and not 0.90.1. Are you installing from src
> or a binary package.  In any case, make sure you have a clean install
> (remove site-packages/matplotlib and if building from src your "build"
> subdirectory before reinstalling).
> 
> Can another 0.90.1 user confirm that this is a problem on that version?
I'm using Ubuntu's (7.10) standard package and since I re-installed the
entire system, that was a *clean* install (though not from source). But,
of course, it might just be that my code was inappropriate.

Christian

On Nov 15, 2007 7:47 AM, Christian Meesters <mee...@un...> wrote:
> Hi,
>
> Sorry, if this has been brought up before, but I missed a while reading
> the list.
>
> When I updated my system lately, I also installed the current version of
> mpl (0.90.1) and that gave me a DeprecationWarning that I should use
> LineCollection now to get my horizontal lines. Well, I didn't figure out
> how to do that until now.

I think you misread the warning on hlines.  You can still use hlines,
just don't pass the "fmt" keyword argument.  Instead, use the keyword
arguments of the LineCollection, eg,

                 colors       = None,
                 antialiaseds  = None,
                 linestyle = 'solid',
                 offsets = None,
                 transOffset = None,#transforms.identity_transform(),
                 norm = None,
                 cmap = None,
                 pickradius = 5,

> TypeError: CXX : Error creating object of type
> N2Py7SeqBaseINS_6ObjectEEE

This error typically arises when the CXX extension code is expecting a
sequence but getting something different.  I can't reproduce it here,
but I am running mpl svn and not 0.90.1. Are you installing from src
or a binary package.  In any case, make sure you have a clean install
(remove site-packages/matplotlib and if building from src your "build"
subdirectory before reinstalling).

Can another 0.90.1 user confirm that this is a problem on that version?

JDH

Hi,

Sorry, if this has been brought up before, but I missed a while reading
the list.

When I updated my system lately, I also installed the current version of
mpl (0.90.1) and that gave me a DeprecationWarning that I should use
LineCollection now to get my horizontal lines. Well, I didn't figure out
how to do that until now.
(NB I have an own wxpython app which makes heavy use of mpl and mostly
uses subplot instances.)

Well, this code snippet 

from pylab import *
from matplotlib.collections import LineCollection

x = subplot(211)
x.add_collection(LineCollection([(0,0)]))

gives the following Traceback:

Exception in Tkinter callback
Traceback (most recent call last):
  File "lib-tk/Tkinter.py", line 1406, in __call__
    return self.func(*args)
  File
"/usr/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py",
line 151, in resize
    self.show()
  File
"/usr/lib/python2.5/site-packages/matplotlib/backends/backend_tkagg.py",
line 154, in draw
    FigureCanvasAgg.draw(self)
  File
"/usr/lib/python2.5/site-packages/matplotlib/backends/backend_agg.py",
line 392, in draw
    self.figure.draw(renderer)
  File "/usr/lib/python2.5/site-packages/matplotlib/figure.py", line
601, in draw
    for a in self.axes: a.draw(renderer)
  File "/usr/lib/python2.5/site-packages/matplotlib/axes.py", line 1286,
in draw
    a.draw(renderer)
  File "/usr/lib/python2.5/site-packages/matplotlib/collections.py",
line 700, in draw
    transoffset)
TypeError: CXX : Error creating object of type
N2Py7SeqBaseINS_6ObjectEEE

The traceback is independent of the backend used, same for wxagg at
least.

Guess, I'm missing something stupid. Can somebody enlighten me?

Thanks,
Christian

Jed Frechette wrote:
> 
> 
> Scott Cooper wrote:
>> 
>> sent to:  mat...@li...
>> 
>> I'm attempting to install matplotlib under version 10.5 ("Leopard") of  
>> the Macintosh operating system.
>> 
>> I had an old installation, via Fink, which broke when I (foolishly)  
>> upgraded from version 10.4 to version 10.5.
>> 
> 
> You might want to try reinstalling Fink. I did a bootstrap install of Fink
> on a new 10.5 install and matplotlib is working fine. Several other tools
> that I use are still missing from Fink on 10.5 but I haven't had any
> problems with matplotlib so far.
> 
> Best of luck,
> 
> --
> Jed Frechette
> University of New Mexico Lidar Lab
> 

Per Jed's suggestion, I did a boostrap install of Fink, into a virgin /sw
directory, then
     /sw/bin/fink --trees=unstable install matplotlib-py24

which failed with
	Could not resolve inconsistent dependencies!
	Fink isn't sure how to install the above packages safely. You may be able
to fix things by running:
	  fink scanpackages
	  sudo apt-get update
	  sudo apt-get install bzip2-dev=1.0.3-1 bzip2-shlibs=1.0.3-1

which I did, with the following result:
	Sorry, bzip2-dev is already the newest version.
	Sorry, bzip2-shlibs is already the newest version.
	0 packages upgraded, 0 newly installed, 0 to remove and 0  not upgraded.

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