Thanks Robert, really appreciate it!
On Thu, Aug 24, 2023 at 12:19 Robert Kern wrote:
> On Wed, Aug 23, 2023 at 10:06 PM Bao Guo wrote:
>
>> I am writing to seek clarification on the specific differences between
>> the numpy.trunc() and numpy.fix() functions.
>>
>> I have come across opinions stating that these two functions exist for
>> backward compatibility and that they serve different functional
>> requirements. However, I am puzzled as to why these functions could not be
>> merged or one of them upgraded to encompass both functionalities. Despite
>> my efforts in researching and contemplating on this matter, I have not come
>> across a convincing explanation.
>>
>> Could anyone kindly shed some light on this matter? I am seeking a deeper
>> understanding of the design choices made for these functions and the
>> rationale behind their coexistence.
>>
>> Thank you in advance for your time and assistance.
>
>
> `fix()` was added to numpy back in the super-early days when it was
> emerging from Numeric, its earlier predecessor. It was named after the
> equivalent MATLAB function.
>
> At some point thereafter, we settled on a policy for inclusion of
> mathematical ufuncs into numpy. We got tired of arguing whether a special
> function was "important enough" to be in numpy instead of scipy.special.
> Eventually, we settled on a bright line that if a math function was in the
> C99 standard, we'd go ahead and allow a ufunc for it in numpy. `trunc()` is
> the name of that equivalent function in the C99 standard. It is a ufunc
> instead of a plain function like `fix()` and has a (strict, I believe)
> superset of functionality. You can ignore `fix()`, more or less. I'm not
> sure if it's on the list for deprecation/removal in numpy 2.0, but it
> certainly could be.
>
> --
> Robert Kern
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