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BUG: several nanops fail when axis==0 for 1-dimensional nan arrays #7354

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toddrjen opened this issue Jun 5, 2014 · 1 comment
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BUG: several nanops fail when axis==0 for 1-dimensional nan arrays #7354

toddrjen opened this issue Jun 5, 2014 · 1 comment
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Bug Internals Related to non-user accessible pandas implementation Numeric Operations Arithmetic, Comparison, and Logical operations Testing pandas testing functions or related to the test suite
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0.14.1

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@toddrjen
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toddrjen commented Jun 5, 2014

Several of the functions in nanops, including nanmean, nanmedian, and anything using _get_counts will crash when using a 1-dimensional all-nan array when the axis argument is set to 0.

>>> from pandas.core import nanops
>>> import bottleneck
>>> import numpy as np
>>> nanops._USE_BOTTLENECK = False
>>> 
>>> val = np.tile(np.nan, (5,))
>>> 
>>> bottleneck.nanmean(val, axis=0)
nan
>>> nanops.nanmean(val, axis=0)
TypeError: 'numpy.float64' object does not support item assignment
@jreback jreback added this to the 0.15.0 milestone Jun 5, 2014
@toddrjen toddrjen mentioned this issue Jun 5, 2014
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@jreback jreback modified the milestones: 0.14.1, 0.15.0 Jun 5, 2014
@toddrjen toddrjen mentioned this issue Jun 12, 2014
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jreback pushed a commit that referenced this issue Jun 12, 2014
@toddrjen @jreback
make nanops work when ndim==1 and axis==0 ( issue #7354 )
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@jreback
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jreback commented Jun 12, 2014

closed by #7354

@jreback jreback closed this as completed Jun 12, 2014
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Bug Internals Related to non-user accessible pandas implementation Numeric Operations Arithmetic, Comparison, and Logical operations Testing pandas testing functions or related to the test suite
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