In performing a county-level or cores-based analysis it is often necessary to merge several units together into a larger unit. This function performs this operation, modifying the adjacency graph as needed and attempting to properly aggregate other data columns.
Arguments
- .data
a
redist_mapobject- ...
<tidy-select>the column(s) to merge by- by_existing
if an existing assignment is present, whether to also group by it
- drop_geom
whether to drop the geometry column. Recommended, as otherwise a costly geometric merge is required.
- collapse_chr
if
TRUE, preserve character columns by collapsing their values. For example, a county name column in Iowa might be merged and have entries such as "Cedar~Clinton~Des Moines". Set toFALSEto drop character columns instead.
Value
A merged redist_map object