matplotlib-users Mailing List for matplotlib

I regularly make log-log errorbar plots where the errors are larger than
the y values. This means that the error bar goes a finite distance
upwards, but should go infinitely far downwards. In Debian's 0.87.7-0.3
package, just the top portion is drawn, which seems like a reasonable
solution. But in Ubuntu's 0.90.1-2ubuntu1 package, trying to do a
plot like this causes an error. Any ideas?
Dan
$ python
Python 2.5.1 (r251:54863, Oct 5 2007, 13:36:32) 
[GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from pylab import *
>>> errorbar([1],[1],[2])
(<matplotlib.lines.Line2D instance at 0xb5ac024c>, [<matplotlib.lines.Line2D instance at 0xb5ac00cc>, <matplotlib.lines.Line2D instance at 0xb5ac00ec>], [<matplotlib.collections.LineCollection instance at 0xb5abdfac>])
>>> gca().set_yscale('log')
>>> show()
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)
ValueError: Domain error on transOffset->operator in draw_line_collection

I was not sure on which list to post this, but perhaps someone here =20
can point me in the right direction. I maintain a few installers of =20
scientific python packages for OSX, one of which being matplotlib. I =20
generate mpkg installers with bdist_mpkg, and for the most part it =20
works fine. However, for matplotlib, many users report the following =20
error after installing and importing:
backend =3D matplotlib.rcParams[=92backend=92]
AttributeError: =91module=92 object has no attribute =91rcParams=92
By context, I assume this has something to do with the matplotlibrc =20
setup. This does not happen, by the way, when installing directly (ie. =20=
using python setup.py install) or via eggs. If anyone knows why this =20
may be happening, I would appreciate some feedback.
I'm also wondering if it may ultimately be easier to build eggs, then =20=
perhaps wrap in a nice applescript for a point-and-click installer.
Thanks,
cf