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  • JiaweiZhuang · 2 ✖

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  • Allow DataArray to hold cell boundaries as coordinate variables · 2 ✖

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id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
314862336 https://github.com/pydata/xarray/issues/1475#issuecomment-314862336 https://api.github.com/repos/pydata/xarray/issues/1475 MDEyOklzc3VlQ29tbWVudDMxNDg2MjMzNg== JiaweiZhuang 25473287 2017-07-12T18:50:02Z 2017-07-13T01:48:32Z NONE

Probably the simplest option is to use structured dtypes, which should already work with the existing version of xarray, e.g.,

Thanks, that's a nice trick! Supporting da.x_bounds['start'] will definitely be helpful!

However, I am still concerned about 2D boundaries. Using the structured data type, 2D bounds will be an array of size (Nx,Ny,4) instead of (Nx+1,Ny+1). Although this matches the CF convention, it takes 4x memory and needs to be converted back to (Nx+1,Ny+1) for pcolormesh(). Not a big problem though. I will be happy to go this way if (Nx+1,Ny+1)-sized bounds cannot be implemented.

 
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   Allow DataArray to hold cell boundaries as coordinate variables 242181620
314604740 https://github.com/pydata/xarray/issues/1475#issuecomment-314604740 https://api.github.com/repos/pydata/xarray/issues/1475 MDEyOklzc3VlQ29tbWVudDMxNDYwNDc0MA== JiaweiZhuang 25473287 2017-07-11T23:58:20Z 2017-07-11T23:58:20Z NONE

See also #1079 and #1079 (comment)

Thanks! The idea of NDIntervalIndex mentioned at pandas-dev/pandas#7640 comment seems powerful but too complicated to implement? Could there be a simpler way to hook the boundary attribute to DataArray?

 
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   Allow DataArray to hold cell boundaries as coordinate variables 242181620

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