6 Selection and extraction
| Function | Spatial selection | Temporal selection | Output |
|---|---|---|---|
cube_slice() |
discrete Cartesian product | discrete | cube |
cube_crop() |
rectangular intervals | interval | cube |
cube_extract() |
Cartesian product | discrete | table |
cube_transect() |
ordered spatial pairs | one time | table |
link_events() |
one match per row | one match per row | enriched table |
They are not interchangeable: slice/crop preserve cube semantics, extract/transect produce analytical tables, and event linkage preserves the original event rows.