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GH-45572: [C++][Compute] Add rank_normal function #45573
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@zanmato1984 @WillAyd Does either of you want to take a look at this? |
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@github-actions crossbow submit -g cpp |
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Revision: 21315d9af15b2efb039a37e3d9f6fa84f22cfe27 Submitted crossbow builds: ursacomputing/crossbow @ actions-77243e4960 |
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zanmato1984
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LGTM
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After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit f9283d0. There were no benchmark performance regressions. 🎉 The full Conbench report has more details. |
Rationale for this change
Computing ranks as values of the "probit" function (https://en.wikipedia.org/wiki/Probit), rather than quantiles between 0 and 1, can be useful for machine learning and other tasks.
What changes are included in this PR?
Add a "rank_normal" function that computes array ranks as points on the normal distribution.
It is similar to calling the "rank_quantile" function and then applying the normal percent-point function ("probit").
Are these changes tested?
Yes, by dedicated unit tests.
Are there any user-facing changes?
No, except a new compute function.