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Add complex number support to APIs for returning unique elements #540

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merged 1 commit into from
Dec 13, 2022

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kgryte
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@kgryte kgryte commented Dec 1, 2022

This PR

  • adds complex number support to unique_all, unique_counts, unique_inverse, and unique_values. This PR builds on Add complex number support to equal #528. Namely, by convention, equality is determined by independently comparing real and imaginary components respectively and then performing a logical AND (i.e., if x = a + bj and y = c + dj, then x == y iff a == c AND b == d.
  • requires that complex numbers having at least one component which is NaN be considered unique.
  • as this PR builds on Add complex number support to equal #528, this PR does not support the one-infinity model (see C99) where complex infinites are treated as equal.

@kgryte kgryte added API change Changes to existing functions or objects in the API. topic: Complex Data Types Complex number data types. labels Dec 1, 2022
@kgryte kgryte added this to the v2022 milestone Dec 1, 2022
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LGTM, thanks @kgryte

@rgommers rgommers merged commit 770b53b into main Dec 13, 2022
@rgommers rgommers deleted the cmplx-unique branch December 13, 2022 21:03
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