Thanks for info Goyo and Ben!
2011/3/11 Benjamin Root <ben.r...@ou.edu>
>
>
> 2011/3/10 Søren Nielsen <soren.skou.niel...@gmail.com>
>
>> Hi,
>>
>>
>> When I do an errorbar plot (a.errorbar(), a = axis) with negative values
>> and then try to change the yscale to log (a.set_yscale('log')) matplotlib
>> crashes with:
>>
>> Traceback (most recent call last):
>> File
>> "/usr/lib64/python2.6/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line
>> 14636, in <lambda>
>> lambda event: event.callable(*event.args, **event.kw) )
>> File "/home/specuser/new_workspace/TestDriven/src/RAWPlot.py", line 371,
>> in plotSASM
>> line, ec, el = a.errorbar(sasm.q[q_min:q_max], sasm.i[q_min:q_max],
>> sasm.err[q_min:q_max], picker = 3, label = legend_label, **kwargs)
>> File "/usr/lib64/python2.6/site-packages/matplotlib/axes.py", line 4872,
>> in errorbar
>> barcols.append( self.vlines(x, lower, upper, **lines_kw) )
>> File "/usr/lib64/python2.6/site-packages/matplotlib/axes.py", line 3302,
>> in vlines
>> self.autoscale_view()
>> File "/usr/lib64/python2.6/site-packages/matplotlib/axes.py", line 1627,
>> in autoscale_view
>> YL = self.yaxis.get_major_locator().view_limits(y0, y1)
>> File "/usr/lib64/python2.6/site-packages/matplotlib/ticker.py", line
>> 1119, in view_limits
>> if not is_decade(vmin,self._base): vmin = decade_down(vmin,self._base)
>> File "/usr/lib64/python2.6/site-packages/matplotlib/ticker.py", line
>> 1030, in is_decade
>> return lx==int(lx)
>> OverflowError: cannot convert float infinity to integer
>> Traceback (most recent call last):
>> File
>> "/usr/lib64/python2.6/site-packages/wx-2.8-gtk2-unicode/wx/_core.py", line
>> 14636, in <lambda>
>> lambda event: event.callable(*event.args, **event.kw) )
>> File "/home/specuser/new_workspace/TestDriven/src/RAW.py", line 1953, in
>> addItem
>> newItem = ManipItemPanel(self.underpanel, sasm, font_colour =
>> item_colour)
>> File "/home/specuser/new_workspace/TestDriven/src/RAW.py", line 2353, in
>> __init__
>> color = conv.to_rgb(self.sasm.line.get_mfc())
>> AttributeError: 'NoneType' object has no attribute 'get_mfc'
>>
>> I don't think this should be the expected outcome.. rather it should not
>> plot values that are illegal/negative (i.e. ignore them).
>>
>> Is there a way I can get around this without having to search through my
>> data and remove points that are negative or NaN or INF when the yscale needs
>> to be log? That would also show an incorrect curve since a line would be
>> drawn across the points that were removed.. It should rather be gaps in the
>> line.
>>
>> Thanks,
>> Soren
>>
>>
>>
>>
> Soren,
>
> This is a bug I encountered recently in my investigations with log scales.
> While most projections are handling this properly, there are some cases
> where this problem sneaks in. I have not been able to figure out how to
> permanently address this issue.
>
> For reference, the similiar issue is when zooming in on polar plots with
> the radial axis in log scale.
>
> Ben Root
>
>
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