issue_comments: 367147759

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https://github.com/pydata/xarray/issues/1378#issuecomment-367147759 https://api.github.com/repos/pydata/xarray/issues/1378 367147759 MDEyOklzc3VlQ29tbWVudDM2NzE0Nzc1OQ== 500246 2018-02-20T22:46:27Z 2018-02-20T22:46:27Z CONTRIBUTOR

I cannot see a use case in which repeated dims actually make sense.

I use repeated dimensions to store a covariance matrix. The data variable containing the covariance matrix has 4 dimensions, of which the last 2 are repeated. For example, I have a data variable with dimensions (channel, scanline, element, element), storing an element-element covariance matrix for every scanline in satellite data.

This is valid NetCDF and should be valid in xarray. It would be a significant problem for me if they became disallowed.

 
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