Raymond Hettinger
d4ac094cf9
Minor accuracy improvement for statistics.correlation() (GH-107781)
2023-08-08 17:12:52 +01:00
Raymond Hettinger
457e4d1a51
GH-102670: Use sumprod() to simplify, speed up, and improve accuracy of statistics functions (GH-102649)
2023-03-13 20:06:43 -05:00
Raymond Hettinger
6cd7572f85
Optimize fmean() weighted average ( #102626 )
2023-03-12 12:48:25 -05:00
Nikita Sobolev
bef9efabc3
GH-99155: Fix NormalDist pickle with 0 and 1 protocols (GH99156)
2022-11-06 20:56:41 -06:00
Raymond Hettinger
3d180e3ab2
Improve accuracy for Spearman's rank correlation coefficient. ( #96392 )
2022-08-29 12:19:48 -05:00
Raymond Hettinger
d8d55d13fc
Prepare private _rank() function to be made public. ( #96372 )
2022-08-28 23:41:58 -05:00
Raymond Hettinger
29c8f80760
GH-95861: Add support for Spearman's rank correlation coefficient (GH-95863)
2022-08-18 13:48:27 -05:00
Raymond Hettinger
4395ff1e6a
Statistics inv_cdf sync with corresponding random module normal distributions ( #95265 )
2022-07-26 02:23:33 -05:00
Benjamin Peterson
e39ce7d487
Fix typo in _exact_ratio comment. (GH-94789)
2022-07-12 14:34:23 -07:00
Raymond Hettinger
c9118afd04
Small speed-up for NormalDist.samples (GH-94730)
2022-07-10 22:34:53 -05:00
Raymond Hettinger
e01eeb7b4b
Fix inconsistent return type for statistics median_grouped() gh-92531 ( #92533 )
2022-05-09 02:08:41 -05:00
Raymond Hettinger
5212cbc261
Clean-up and simplify median_grouped(). Vastly improve its docstring. ( #92324 )
2022-05-05 03:01:07 -05:00
Raymond Hettinger
d20bb33f78
Fix renamed "total" variable ( #92287 )
...
* Fix renamed "total" variable
* Keep nan/inf handling consistent between versions
2022-05-03 23:22:04 -05:00
Raymond Hettinger
9badc86fb7
Compute from_sample() in a single pass over the data ( #92284 )
2022-05-03 21:22:26 -05:00
Raymond Hettinger
ec8d3adb99
The stdev calculation is more accurate computing its own mean ( #92220 )
2022-05-03 03:41:46 -05:00
Raymond Hettinger
d5b7bba43b
Statistics internals: Make fewer calls to _coerce() when data types are mixed (GH-31619)
2022-02-28 11:43:52 -06:00
Raymond Hettinger
43aac29cbb
bpo-46257: Convert statistics._ss() to a single pass algorithm (GH-30403)
2022-01-05 09:39:10 -06:00
Ned Batchelder
c602c1be43
Fix double-space in exception message (GH-29955)
2021-12-08 12:42:02 +02:00
Raymond Hettinger
0aa0bd0563
bpo-45876: Have stdev() also use decimal specific square root. (GH-29869)
2021-11-30 19:25:57 -06:00
Raymond Hettinger
a39f46afde
bpo-45876: Correctly rounded stdev() and pstdev() for the Decimal case (GH-29828)
2021-11-30 18:20:08 -06:00
Raymond Hettinger
af9ee57b96
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>
2021-11-26 22:54:50 -07:00
Raymond Hettinger
d2b55b07d2
bpo-45766: Add direct proportion option to linear_regression(). ( #29490 )
...
* bpo-45766: Add direct proportion option to linear_regression().
* Update 2021-11-09-09-18-06.bpo-45766.dvbcMf.rst
* Use ellipsis to avoid round-off issues.
* Update Misc/NEWS.d/next/Library/2021-11-09-09-18-06.bpo-45766.dvbcMf.rst
Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
* Update signature in main docs
* Fix missing comma
Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@innova.no>
2021-11-21 08:39:26 -06:00
Raymond Hettinger
04e03f496c
bpo-45851: Avoid full sort in statistics.multimode() ( #29662 )
...
Suggested by Stefan Pochmann.
2021-11-20 10:04:37 -06:00
Raymond Hettinger
c3bc0fe5a6
Factor-out constant calculation. (GH-29491)
2021-11-09 10:30:06 -06:00
Raymond Hettinger
4a5cccb02b
bpo-20499: Rounding error in statistics.pvariance (GH-28230)
2021-09-08 22:00:12 -05:00
Raymond Hettinger
793f55bde9
bpo-39218: Improve accuracy of variance calculation (GH-27960)
2021-08-30 20:57:30 -05:00
Raymond Hettinger
3668e118f7
Update nonstandard variable names (GH-26540)
2021-06-04 16:28:31 -07:00
Raymond Hettinger
2f2e703244
bpo-44151: Various grammar, word order, and markup fixes (GH-26344)
2021-05-24 23:04:04 -07:00
Zack Kneupper
2f3a87856c
bpo-44151: linear_regression() minor API improvements (GH-26199)
2021-05-24 17:30:58 -07:00
Raymond Hettinger
be4dd7fcd9
bpo-44150: Support optional weights parameter for fmean() (GH-26175)
2021-05-20 20:22:26 -07:00
Raymond Hettinger
b3f65e819f
Apply edits from Allen Downey's review of the linear_regression docs. (GH-26176)
2021-05-16 19:21:14 -07:00
Raymond Hettinger
fdfea4ab16
Improve speed and accuracy for correlation() (GH-26135)
2021-05-15 11:00:51 -07:00
Raymond Hettinger
55b78ce3c4
Eliminate duplicated calculations and unnecessary work for linear regression (GH-25922)
2021-05-06 07:43:13 -07:00
Raymond Hettinger
1add719516
Fix inconsistent fsum vs sum and fmean vs mean (GH-25898)
2021-05-04 11:27:28 -07:00
Tymoteusz Wołodźko
09aa6f914d
bpo-38490: statistics: Add covariance, Pearson's correlation, and simple linear regression ( #16813 )
...
Co-authored-by: Tymoteusz Wołodźko <twolodzko+gitkraken@gmail.com
2021-04-25 14:45:09 +03:00
Raymond Hettinger
30a8b28396
bpo-43147: Remove archaic terminology. (GH-24462)
2021-02-07 16:44:42 -08:00
Raymond Hettinger
cc3467a57b
bpo-38308: Add optional weighting to statistics.harmonic_mean() (GH-23914)
2020-12-23 19:52:09 -08:00
Raymond Hettinger
5aad027db9
Some reformatting (suggested by Black) and minor factoring. (GH-20865)
2020-06-13 19:17:28 -07:00
Raymond Hettinger
d71ab4f738
bpo-40855: Fix ignored mu and xbar parameters (GH-20835)
2020-06-13 15:55:52 -07:00
Raymond Hettinger
0400a7f2f8
Minor code cleanups for statistics (GH-19873)
...
* Minor cleanups: Removed unused code. Move C import near its Python version.
* Clean-up whitespace
2020-05-02 19:30:24 -07:00
Raymond Hettinger
70f027dd22
bpo-40290: Add zscore() to statistics.NormalDist. (GH-19547)
2020-04-16 10:25:14 -07:00
Raymond Hettinger
733b9a308e
bpo-38385: Fix iterator/iterable terminology in statistics docs (GH-17111)
2019-11-11 23:35:06 -08:00
Raymond Hettinger
5eabec022b
bpo-38521: Fix error in NormalDist.__eq__() (GH-16840)
2019-10-18 14:20:35 -07:00
Raymond Hettinger
7ce4bfa8cf
Minor code and comment cleanup (GH-16315)
2019-09-20 21:46:52 -07:00
Raymond Hettinger
272d0d017a
bpo-36546: No longer a need to make "data" positional only (GH-16252)
2019-09-17 20:45:05 -07:00
Raymond Hettinger
4db25d5c39
bpo-36018: Address more reviewer feedback (GH-15733)
2019-09-08 16:57:58 -07:00
Raymond Hettinger
e4810b2a6c
bpo-36324: Apply review comments from Allen Downey (GH-15693)
2019-09-05 00:18:47 -07:00
Dong-hee Na
0a18ee4be7
bpo-37798: Add C fastpath for statistics.NormalDist.inv_cdf() (GH-15266)
2019-08-23 15:20:30 -07:00
Raymond Hettinger
8183bb8150
bpo-36324: Update comments to include the target hash sums (GH-15110)
2019-08-04 11:52:04 -07:00
Raymond Hettinger
1c0e9bb94b
Minor whitespace, indentation, and quoting changes to improve internal consistency and appease linters (GH-14888)
2019-07-21 12:13:07 -07:00
