[Numpy-discussion] quantile() or percentile()

Joseph Fox-Rabinovitz jfoxrabinovitz at gmail.com
Fri Jul 21 17:21:44 EDT 2017

I think that there would be a very good reason to have a separate function
if we were to introduce weights to the inputs, similarly to the way that we
have mean and average. This would have some (positive) repercussions like
making weighted histograms with the Freedman-Diaconis binwidth estimator a
possibility. I have had this change on the back-burner for a long time,
mainly because I was too lazy to figure out how to include it in the C
code. However, I will take a closer look.



On Fri, Jul 21, 2017 at 5:11 PM, Chun-Wei Yuan <chunwei.yuan at gmail.com>

> There's an ongoing effort to introduce quantile() into numpy.  You'd use
> it just like percentile(), but would input your q value in probability
> space (0.5 for 50%):
> https://github.com/numpy/numpy/pull/9213
> Since there's a great deal of overlap between these two functions, we'd
> like to solicit opinions on how to move forward on this.
> The current thinking is to tolerate the redundancy and keep both, using
> one as the engine for the other.  I'm partial to having quantile because
> 1.) I prefer probability space, and 2.) I have a PR waiting on quantile().
> Best,
> C
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