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feat: add count_nonzero to specification #803

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@kgryte kgryte commented May 2, 2024

This PR

  • resolves RFC: add count_nonzero for counting the number of "non-zero" values #794 by adding support for counting the number of non-zero values to the specification.
  • is consistent with statistical functions (such as max, mean, sum, etc) in supporting one or more axes over which to perform the reduction and in supporting keepdims to ensure the returned result is broadcast compatible.
  • follows nonzeros (ref: Add specifications for functions for searching arrays #23 (comment)) in disallowing zero-dimensional input arrays. Note, however, that the statistical function APIs do not contain any explicit guidance regarding minimum rank.
  • updates nonzeros by moving the notes to a dedicated notes section (i.e., below the "fold").

@kgryte kgryte added the API extension Adds new functions or objects to the API. label May 2, 2024
@kgryte kgryte added this to the v2024 milestone May 2, 2024
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RFC: add count_nonzero for counting the number of "non-zero" values
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