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https://issues.apache.org/jira/browse/ARROW-6485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17459900#comment-17459900
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Kenta Murata commented on ARROW-6485:
-------------------------------------

[~apitrou] I’m still interested in this feature but I suspect whether people 
want Apache Arrow to have this feature because nobody have never mentioned this 
feature.

> [Format][C++]Support the format of a COO sparse matrix that has separated row 
> and column indices
> ------------------------------------------------------------------------------------------------
>
>                 Key: ARROW-6485
>                 URL: https://issues.apache.org/jira/browse/ARROW-6485
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++, Format
>            Reporter: Kenta Murata
>            Assignee: Kenta Murata
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 8.0.0
>
>          Time Spent: 1h 50m
>  Remaining Estimate: 0h
>
> For supporting non-copy interchanging of scipy.sparse.coo_matrix, I'd like to 
> add the new format of a COO matrix that has separated row and column indices.



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