issues: 1308371056

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
1308371056 I_kwDOAMm_X85N_Chw 6806 New alignment option: "exact" without broadcasting OR Turn off automatic broadcasting 2448579 closed 0     9 2022-07-18T18:43:31Z 2024-03-13T15:36:35Z 2024-03-13T15:36:35Z MEMBER      

Is your feature request related to a problem?

If we have two objects with dims x and x1, then xr.align(..., join="exact") will pass because these dimensions are broadcastable.

I'd like a stricter option (join="strict"?) that disallows broadcasting.

Describe the solution you'd like

python xr.align( xr.DataArray([1], dims="x"), xr.DataArray([1], dims="x1"), join="strict", ) would raise an error.

It'd be nice to have this as a built-in option so we can use python with xr.set_options(arithmetic_join="strict"): ...

Describe alternatives you've considered

An alternative would be to allow control over automatic broadcasting through the set_options context manager., but that seems like it would be more complicated to implement.

Additional context

This turns up in staggered grid calculations with xgcm where it is easy to mistakenly construct very high-dimensional arrays because of automatic broadcasting.

 
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