nealrichardson commented on pull request #8269: URL: https://github.com/apache/arrow/pull/8269#issuecomment-700081921
Two notes: 1. Naming: I've never seen this called `stdev` anywhere. `stddev` is common, in numpy and julia it's `std`, in R it's `sd`. Let's go with one of those. Maybe just add an extra "d"? 2. Since `sd = sqrt(var)` (https://github.com/apache/arrow/pull/8269/files#diff-461bd7e445c2a190f1173ebdefa21002R106), would it make sense to implement variance (i.e. most of this patch), and then standard deviation as the sqrt of that? That way we get two kernels (or even three, if sqrt is exposed as a kernel too). ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
