issue_comments: 1277226702

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https://github.com/pydata/xarray/issues/7157#issuecomment-1277226702 https://api.github.com/repos/pydata/xarray/issues/7157 1277226702 IC_kwDOAMm_X85MIO7O 43316012 2022-10-13T08:22:22Z 2022-10-13T08:23:43Z COLLABORATOR

Thank you for the report. If you read the documentation of DataArray.reduce you will find that func need to be:

Function which can be called in the form f(x, axis=axis, **kwargs) to return the result of reducing an np.ndarray over an integer valued axis.

So it operates on numpy arrays and not xarray DataArrays.

So try using np.cumsum instead.

 
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