issue_comments: 609728948

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html_url issue_url id node_id user created_at updated_at author_association body reactions performed_via_github_app issue
https://github.com/pydata/xarray/issues/3941#issuecomment-609728948 https://api.github.com/repos/pydata/xarray/issues/3941 609728948 MDEyOklzc3VlQ29tbWVudDYwOTcyODk0OA== 30388627 2020-04-06T11:09:10Z 2020-04-06T11:09:10Z NONE

Solution (Boolean)

```

stack indexes

index_list = np.column_stack((sindex, eindex))

all false array

boolean_array = np.zeros(a.shape, dtype=bool)

iterate and assign true

for row in range(len(index_list)): boolean_array[row, np.arange(index_list[row][0], index_list[row][1]+1)] = True

sum_a = a.where(boolean_array).sum(dim='y') ```

 
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