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Inconsistent results when subtracting two large float64 columns #12120

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canthonissen opened this issue Jan 22, 2016 · 2 comments
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Inconsistent results when subtracting two large float64 columns #12120

canthonissen opened this issue Jan 22, 2016 · 2 comments

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@canthonissen
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test = numpy.DataFrame(numpy.random.normal(size=(80000,2)))
k = test[0] - test[1]

Works most of the time, but sometimes gives a column of zero (or near zeros) as output.
Does not seem to affect small dataframes.

@jreback
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jreback commented Jan 22, 2016

well if you are on windows and using numexpr=2.4.4 or lower then its a dupe of: #12023

if not, pls pd.show_versions()

@canthonissen
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Yup numexpr 2.4.4.
Thanks.

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