Hi again, Yesterday a PR was opened to sample uniformly from the surface of the unit sphere: ENH: Random direction distribution by dschmitz89 · Pull Request #17277 · scipy/scipy (github.com) <https://github.com/scipy/scipy/pull/17277> The API is the following: a multivariate distribution* scipy.stats.random_direction(dim) *with a *.rvs() *method. Setting the dimension is required. The *.rvs(size) *method follows the convention of numpy's multivariate_normal: for *size=(m, n)* it will generate samples of the shape *(m, n, dim).* If this sounds interesting to you, please join the discussion on github. Best Am So., 5. Juni 2022 um 20:09 Uhr schrieb Pamphile Roy < roy.pamphile@gmail.com>:
Hi Daniel,
I also think these would be interesting.
I am myself very interested in the sampling part, as we actually recently added poisson disk sampling which internally uses hypersphere sampling. I would be happy to help with this work.
Cheers, Pamphile (@tupui)
On 5 Jun 2022, at 17:04, Robert Kern <robert.kern@gmail.com> wrote:
Yes, I think both have a place in scipy.stats. Thanks!
On Sun, Jun 5, 2022 at 5:55 AM Daniel Schmitz < danielschmitzsiegen@googlemail.com> wrote:
Hi everyone,
recently questions came up with regards to statistics on the unit sphere in scipy.
Issue 12041 <https://github.com/scipy/scipy/issues/12041> raises the question if spherical mean/variance should be added as descriptive statistics similar to circmean/circvar <https://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.circvar.htm...> . The canonical reference for all things related to statistics on the unit sphere is "Directional Statistics" by Mardia & Jupp.
Another important basic functionality is the generation of random samples on the unit sphere: discussion was started in this issue <https://github.com/scipy/scipy/issues/16205> .
Any strong opinion against these? I think at least the random number generation is reimplemented every day around the world (done so myself at least 2 times) and would strongly benefit from being part of scipy.
Best _______________________________________________ SciPy-Dev mailing list -- scipy-dev@python.org To unsubscribe send an email to scipy-dev-leave@python.org https://mail.python.org/mailman3/lists/scipy-dev.python.org/ Member address: robert.kern@gmail.com
-- Robert Kern _______________________________________________ SciPy-Dev mailing list -- scipy-dev@python.org To unsubscribe send an email to scipy-dev-leave@python.org https://mail.python.org/mailman3/lists/scipy-dev.python.org/ Member address: roy.pamphile@gmail.com
_______________________________________________ SciPy-Dev mailing list -- scipy-dev@python.org To unsubscribe send an email to scipy-dev-leave@python.org https://mail.python.org/mailman3/lists/scipy-dev.python.org/ Member address: danielschmitzsiegen@googlemail.com