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| -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 |