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| author | Charles Harris <charlesr.harris@gmail.com> | 2014-07-06 23:43:25 -0600 |
|---|---|---|
| committer | Charles Harris <charlesr.harris@gmail.com> | 2014-07-06 23:43:25 -0600 |
| commit | 594b0de1f09fde18c9c786994d7146a99f35e7d0 (patch) | |
| tree | 565e500a799616aba7a6376c8394da96d6ec1348 /doc | |
| parent | d244ec7c00fb4658f7c9d66eb027ee84c7a6f05c (diff) | |
| parent | cdfbc69b84a168b4ab8654e2bc818d7b4e444037 (diff) | |
| download | numpy-594b0de1f09fde18c9c786994d7146a99f35e7d0.tar.gz | |
Merge pull request #4697 from charris/update-1.9.0-notes
DOC: Update 1.9.0-notes to mention pairwise summation.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/release/1.9.0-notes.rst | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/release/1.9.0-notes.rst b/doc/release/1.9.0-notes.rst index e1e958e9d..8d6308046 100644 --- a/doc/release/1.9.0-notes.rst +++ b/doc/release/1.9.0-notes.rst @@ -331,6 +331,12 @@ in either an error being raised, or wrong results computed. Improvements ============ +Better numerical stability for sum in some cases +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Pairwise summation is now used in the sum method, but only along the fast +axis and for groups of the values <= 8192 in length. This should also +improve the accuracy of var and std in some common cases. + Percentile implemented in terms of ``np.partition`` ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``np.percentile`` has been implemented in terms of ``np.partition`` which |