same indices, different data?

[indebetouw]

I am interested in computing a dendrogram using one cube, and then calculating a PPVCatalog using the same assignment indices, but a different data cube. I've tried setting the .data, ._data, and some other things, but is there a way to re-index, or re-fill all of the individual structures' values, without recomputing? Yes, I know the heirarchical nature of the dendrogram is no longer necessarily self-consistent if I apply it to a new data cube, but I want to compare different emission lines over exactly the same regions. Thanks.

[keflavich]

@indebetouw if your cubes have the same shape, you can access the mask for an individual structure with the .get_mask attribute, e.g.: https://github.com/keflavich/APEX_CMZ_H2CO/blob/master/analysis/dendro_temperature.py#L150

From that mask, you can then compute various attributes (e.g., sum, mean, etc.) of the other molecules and add them to your catalog as in the example script linked.

[indebetouw]

Thanks Adam! Is the view and submask in that script just for speed, or am I missing something critical about doing that way? I liked the Formaldehyde paper too BTW.

[keflavich]

Yes, the submask is just for speed. Thanks!