Thomas J. Duck wrote: > Determining the minimum value of an array that contains NaN produces > a surprising result: > > >>> x = numpy.array([0,1,2,numpy.nan,4,5,6]) > >>> x.min() > 4.0 > > I expected 0.0. Is this the intended behaviour or a bug? I am using > numpy 1.1.1. > NAN's don't play well with comparisons because comparison with them is undefined. See numpy.nanmin
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