IMO the best long-term solution is to make sure that the built-in stats module (https://docs.python.org/3/library/statistics.html) can be used. However, as explained in the ticket https://trac.sagemath.org/ticket/29662 (and https://trac.sagemath.org/ticket/28234), there are bugs that prevent users from using it with some Sage types.
On Saturday, February 12, 2022 at 7:28:43 PM UTC-8 wst...@gmail.com wrote: > This happened in https://trac.sagemath.org/ticket/29662, as requested > by kcrisman. I just looked at that > ticket and added a comment about several additional examples where > deprecating mean breaks things > in subtle ways... > > On Sat, Feb 12, 2022 at 7:14 PM Samuel Lelievre > <samuel....@gmail.com> wrote: > > > > Dear sage-devel, > > > > Taking averages is a common operation, and a `mean` function > > such that `mean(xx)` returns `sum(xx) / len(xx)` regardless of > > the type of objects in the iterable `xx` is extremely convenient. > > > > For instance, for a polygon whose vertices `uu` have coordinates > > in a number field and are represented as vectors over that field, > > `mean(uu)` finds the centre of that polygon. To center the polygon > > at the origin, use `c = mean(uu)` and `vv = [u - c for u in uu]`. > > > > In Sage 9.5, using `mean` displays a warning: > > ``` > > DeprecationWarning: sage.stats.basic_stats.mean is deprecated; > > use numpy.mean or numpy.nanmean instead > > ``` > > This is after #29662 was merged in SageMath 9.5.beta1. > > > > Alas, `numpy.mean` cannot find the mean of a list of vectors > > over a number field. > > > > Of course, as a workaround, I can define > > > > def mean(xx): > > r""" > > Return the mean of this iterable. > > """ > > return sum(xx) / len(xx) > > > > and place that in an `init.sage` file in my `~/.sage` folder. > > > > Having that built into Sage is so much more convenient though. > > Can we have it back? > > > > Kind polygonal regards, --Samuel > > > > -- > > You received this message because you are subscribed to the Google > Groups "sage-devel" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to sage-devel+...@googlegroups.com. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/60fe4b1c-db88-4caa-8d13-670b9b3edb79n%40googlegroups.com > . > > > > -- > William (http://wstein.org) > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/72970d04-877d-41bb-8af5-7dce382f887bn%40googlegroups.com.
