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Catch warning thrown in Mollweide projection. #3282

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Merged
merged 2 commits into from
Aug 26, 2014
Merged

Catch warning thrown in Mollweide projection. #3282

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ef2c5fa
Catch warning thrown in Mollweide projection.
jenshnielsen Jul 21, 2014
ffe211e
Filter warnings with more selective np.errstate context
lpsinger Jul 21, 2014
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39 changes: 25 additions & 14 deletions lib/matplotlib/axis.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1010,20 +1010,31 @@ def _update_ticks(self, renderer):
# the idea that one would rather potentially lose a tick
# from one side of the axis or another, rather than see a
# stack trace.
try:
ds1 = self._get_pixel_distance_along_axis(interval_expanded[0], -0.5)
except:
warnings.warn("Unable to find pixel distance along axis for interval padding; assuming no interval padding needed.")
ds1 = 0.0
if np.isnan(ds1):
ds1 = 0.0
try:
ds2 = self._get_pixel_distance_along_axis(interval_expanded[1], +0.5)
except:
warnings.warn("Unable to find pixel distance along axis for interval padding; assuming no interval padding needed.")
ds2 = 0.0
if np.isnan(ds2):
ds2 = 0.0
# We also catch users warnings here. These are the result of
# invalid numpy calculations that may be the result of out of
# bounds on axis with finite allowed intervals such as geo
# projections i.e. Mollweide.
with np.errstate(invalid='ignore'):
try:
ds1 = self._get_pixel_distance_along_axis(
interval_expanded[0], -0.5)
except:
warnings.warn("Unable to find pixel distance along axis for\
interval padding of ticks; assuming no interval padding\
needed.")
ds1 = 0.0
if np.isnan(ds1):
ds1 = 0.0
try:
ds2 = self._get_pixel_distance_along_axis(
interval_expanded[1], +0.5)
except:
warnings.warn("Unable to find pixel distance along axis for\
interval padding of ticks; assuming no interval padding\
needed.")
ds2 = 0.0
if np.isnan(ds2):
ds2 = 0.0
interval_expanded = (interval_expanded[0] - ds1,
interval_expanded[1] + ds2)

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