rapidsai/cudf

[FEA] Exploit Symmetry for `groupby.corr` and `groupby.cov`

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#10,098 创建于 2022年1月20日

 (3 条评论) (1 个反应) (0 位负责人)C++ (735 个派生)batch import
Pythonfeature requestgood first issue

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描述

In https://github.com/rapidsai/cudf/pull/9889#discussion_r771493338, @bdice made an observation that due to symmetry, there's a chance of utilizing that to reduce computation by only applying the upper half of the matrix. In an attempt to reduce the scope of the PR, this is the issue that tracks the suggestion separately. If applicable, groupby.corr should also share the logic.

cc @skirui-source

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