Adding a utility function to subset RCTD/spacexr object based on spatial spot ids

[simoncmo]

Hi Spacexr team,

Thanks for the great tool! In some scenario I realize I want to subset the resulting RCTD/spacexr object based on the desired spatial barcode id to make the downstream processing smoother. So I wrote this simple subset function that essentially subset following 3 slots

1. @spatialRNA
2. @originalSpatialRNA
3. @results$weights
   to match spots provided by user
   a example using (using Visium seurat object) would be

rctd_obj = readRDS('path/to/rctd_object.rds')
st_obj = readRDS('path/to/visium_seurat_object.rds')
spot_ids_keep = colnames(st_obj)[1:300]
rctd_obj_new = subset(rctd_obj, spot_ids_keep)

Hope this make sense and could benefit other user too. Please let me know if you have any questions or suggestions for improvement!

Thanks,

Simon

[dmcable]

great, thanks, this looks like a useful function!