[Numpy-discussion] Round away from zero (towards +/- infinity)
tjhnson at gmail.com
Thu Oct 2 19:08:56 EDT 2014
Any bites on this?
On Wed, Sep 24, 2014 at 12:23 PM, T J <tjhnson at gmail.com> wrote:
> Is there a ufunc for rounding away from zero? Or do I need to do
> x2 = sign(x) * ceil(abs(x))
> whenever I want to round away from zero? Maybe the following is better?
> x_ceil = ceil(x)
> x_floor = floor(x)
> x2 = where(x >= 0, x_ceil, x_floor)
> Python's round function goes away from zero, so I am looking for the NumPy
> equivalent (and using vectorize() seems undesirable). In this sense, it
> seems that having a ufunc for this type of rounding could be helpful.
> Aside: Is there interest in a more general around() that allows users to
> specify alternative tie-breaking rules, with the default staying 'round
> half to nearest even'? 
> Also, what is the difference between NumPy's fix() and trunc() functions?
> It seems like they achieve the same goal. trunc() was added in 1.3.0. So is
> fix() just legacy?
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