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


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