Clarification Needed: 'spatial_key' Parameter in 'MappingProblem' Function

[AhaYW]

In the code snippet from "notebooks/space/mapping/moscot_mapping_citeseq2.ipynb," the MappingProblem function is used with the spatial_key parameter specified as follows:

MappingProblem(adata_sc, adata_spatial).prepare(
# other parameters...
spatial_key={"attr": "obsm", "key": "X_pca_scaled"},
# other parameters...
)

However, in the function documentation, it mentions "spatial_key (Union[str, Mapping[str, Any]]) as the key in obsm where the spatial coordinates are stored." I would like clarification on the role of spatial_key: does it refer to the key for storing spatial coordinates or the key for storing gene expression information?
This clarification is crucial for accurately configuring the spatial_key parameter in different scenarios. Thank you!

[MUCDK]

Hi @AhaYW ,

Sorry for the late response. In general, please feel free to open issues on the main repo: https://github.com/theislab/moscot

spatial_key refers to the spatial coordinates . joint_attr wouuld be for sequencing data, e.g. gene expression.