On 4/8/19 6:25 AM, Steven D'Aprano wrote:
> On Mon, Apr 08, 2019 at 02:55:54AM -0700, Nathaniel Smith wrote:
>> If only we had some kind of API that could compute multiple quantiles at
>> the same time...
>
> You mean something like this?
>
> quartiles, quintiles, deciles, percentiles = quantiles(data,
n=(4, 5, 10, 100))
>
> Yuck :-)
>
> I'd rather allow an already_sorted=True parameter :-)
I'd rather have a separate function. I can't think of a good name for
it right now, but it'd be just like quantiles, except that you'd pass it
a sorted list. Conceptually, it'd fit in like this:
def quantiles(data, n):
if isinstance(data, list): # or some other appropriate test
sorted_data = sorted(data)
else:
sorted_data = data
quantiles_of_sorted_data(sorted_data, n)
def quantiles_of_sorted_data(sorted_data, n):
...actual quantiles functionality here...
Properly constructed programs that would have called quantiles
repeatedly can call quantiles_of_sorted_data repeatedly instead. The
ability to shoot a foot remains unchanged.
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