Add an arithmetic_compat option to xr.set_options #10943
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…ow non-index coordinates of the same name are compared for potential conflicts when performing binary operations. The default of compat='minimal' matches the previous behaviour.
mjwillson
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max-sixty
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Nov 28, 2025
Co-authored-by: Maximilian Roos <5635139+max-sixty@users.noreply.github.com>
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This determines how non-index coordinates of the same name are compared for potential conflicts when performing binary operations.
The default is
arithmetic_compat='minimal', which matches the previous behaviour.I had originally planned to set this up to migrate the default to
arithmetic_compat='override'alongside the wider migration of default to `compat='override' elsewhere. However I've held off on this for now pending a decision on what to do anything about the original motivation of compat='minimal' here which was to drop clashing scalar coordinates that arise from things like arr[0] + arr[1].I think this is nice to have in general, complimenting the
arithmetic_joinsetting and making sure we have the same degree of control over this for arithmetic operations as we do for things likexr.merge. But the immediate motivation was#10924 where we need to skip equality checks on coordinates in situations where we want to JIT a function that uses jax arrays for coordinates.
whats-new.rst