issue_comments: 850819741

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https://github.com/pydata/xarray/pull/5390#issuecomment-850819741 https://api.github.com/repos/pydata/xarray/issues/5390 850819741 MDEyOklzc3VlQ29tbWVudDg1MDgxOTc0MQ== 5700886 2021-05-29T11:48:02Z 2021-05-29T11:48:02Z CONTRIBUTOR

Shouldn't the following do? python cov = ( (da_a * da_b).mean(dim) - ( da_a.where(da_b.notnull()).mean(dim) * da_b.where(da_a.notnull()).mean(dim) ) ) (See here: https://nbviewer.jupyter.org/gist/willirath/cfaa8fb1b53fcb8dcb05ddde839c794c )

 
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