Return neighboring cell IDs for each input cell

For each cell ID in cells, returns the IDs of all adjacent cells. Triangle grids are not supported.

Usage

dgneighbors(dggs, cells)

Arguments

dggs: A dggs object from dgconstruct()
cells: Integer vector of cell sequence numbers (SEQNUM)

Value

A data frame with columns seqnum (the input cell) and neighbor (each adjacent cell ID).

Examples

library(dggridR)
dgneighbors(dgconstruct(res=3), c(1, 2, 3))
#>    seqnum neighbor
#> 1       1       34
#> 2       1       61
#> 3       1       88
#> 4       1      115
#> 5       1        7
#> 6       2        8
#> 7       2        5
#> 8       2      133
#> 9       2      136
#> 10      2      250
#> 11      3        9
#> 12      3        6
#> 13      3      124
#> 14      3      127
#> 15      3      133
#> 16      3        5