issue_comments: 43359850

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https://github.com/pydata/xarray/issues/131#issuecomment-43359850 https://api.github.com/repos/pydata/xarray/issues/131 43359850 MDEyOklzc3VlQ29tbWVudDQzMzU5ODUw 2443309 2014-05-16T17:49:14Z 2014-05-16T17:49:14Z MEMBER

Both NCO and CDO keep all attributes, and as you mention, maintain a history attribute. Even for operations like "variance" where the units are no longer accurate.

Maybe we're headed to a user specified option to keep the attributes around with the default being option 1. I can see this existing at any (but probably not all) of these levels: - module (xray.maintain_attributes=True) - class (keyword in Dataset or DataArray __init__(self, ..., maintain_attributes=True) - method (ds.mean(dim='time', maintain_attributes=True)

This approach would put the onus on the user to specify they want to keep metadata around. My preference would be to apply this at the module level.

 
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