Hi Experts, i just stumbled upon something i can't quite explain (or rather i think i can explain it, but i cannot understand it):
Consider the following minimal example:
plot([1], [2],'o-'); show()
draws a single point at coords (1,2) - perfectly fine.
but when i try to plot the same at (0,2), i get an error:
plot([0], [2],'o-'); show()
--------------------------------------------------------------------------------
/usr/lib/python2.4/site-packages/matplotlib/pylab.py in plot(*args, **kwargs)
2016 hold(h)
2017 try:
-> 2018 ret = gca().plot(*args, **kwargs)
2019 draw_if_interactive()
2020 except:
/usr/lib/python2.4/site-packages/matplotlib/axes.py in plot(self, *args,
**kwargs)
2788 lines.append(line)
2789 lines = [line for line in lines] # consume the generator
-> 2790 self.autoscale_view()
2791 return lines
2792
/usr/lib/python2.4/site-packages/matplotlib/axes.py in autoscale_view(self)
813
814 locator = self.xaxis.get_major_locator()
--> 815 self.set_xlim(locator.autoscale())
816 locator = self.yaxis.get_major_locator()
817 self.set_ylim(locator.autoscale())
/usr/lib/python2.4/site-packages/matplotlib/ticker.py in autoscale(self)
796 dmin, dmax = self.dataInterval.get_bounds()
797 dmin, dmax = self.nonsingular(dmin, dmax, expander = 0.05)
--> 798 return take(self.bin_boundaries(dmin, dmax), [0,-1])
799
800
/usr/lib/python2.4/site-packages/matplotlib/ticker.py in bin_boundaries(self,
vmin, vmax)
766 def bin_boundaries(self, vmin, vmax):
767 nbins = self._nbins
--> 768 scale, offset = scale_range(vmin, vmax, nbins)
769 vmin -= offset
770 vmax -= offset
/usr/lib/python2.4/site-packages/matplotlib/ticker.py in scale_range(vmin,
vmax, n, threshold)
731 dv = abs(vmax - vmin)
732 meanv = 0.5*(vmax+vmin)
--> 733 var = dv/max(abs(vmin), abs(vmax))
734 if var < 1e-12:
735 return 1.0, 0.0
ZeroDivisionError: float division
--------------------------------------------------------------------------------
I assume this is becaus matplotlib is unable to figure out the width to which
it should scale the plot...
Any idea how to fix this?
thanks in advance,
Holger
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