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| author | Raymond Hettinger <rhettinger@users.noreply.github.com> | 2021-11-27 05:54:50 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-11-27 05:54:50 (GMT) |
| commit | af9ee57b96cb872df6574e36027cc753417605f9 (patch) | |
| tree | f0cce757d3ce53ff64b31706875b3b8290f6f0ab /Modules/_testmultiphase.c | |
| parent | db55f3fabafc046e4fca907210ced4ce16bf58d6 (diff) | |
| download | cpython-af9ee57b96cb872df6574e36027cc753417605f9.zip cpython-af9ee57b96cb872df6574e36027cc753417605f9.tar.gz cpython-af9ee57b96cb872df6574e36027cc753417605f9.tar.bz2 | |
bpo-45876: Improve accuracy for stdev() and pstdev() in statistics (GH-29736)
* Inlined code from variance functions
* Added helper functions for the float square root of a fraction
* Call helper functions
* Add blurb
* Fix over-specified test
* Add a test for the _sqrt_frac() helper function
* Increase the tested range
* Add type hints to the internal function.
* Fix test for correct rounding
* Simplify ⌊√(n/m)⌋ calculation
Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
* Add comment and beef-up tests
* Test for zero denominator
* Add algorithmic references
* Add test for the _isqrt_frac_rto() helper function.
* Compute the 109 instead of hard-wiring it
* Stronger test for _isqrt_frac_rto()
* Bigger range
* Bigger range
* Replace float() call with int/int division to be parallel with the other code path.
* Factor out division. Update proof link. Remove internal type declaration
Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
Diffstat (limited to 'Modules/_testmultiphase.c')
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