This function uses a vector of variable names and a vector of ZOI radii to create
a data.frame with all combinations of variable names and zoi radii, to ease
listing or accessing them from GRASS GIS or for setting up a model formula.
Examples
# attaching zoi_radius to the end
name <- c("houses", "roads", "railways")
radii <- seq(100, 500, by = 100)
add_zoi_layers(name, radii)
#> zoi_radius layer
#> 1 100 houses100
#> 2 100 roads100
#> 3 100 railways100
#> 4 200 houses200
#> 5 200 roads200
#> 6 200 railways200
#> 7 300 houses300
#> 8 300 roads300
#> 9 300 railways300
#> 10 400 houses400
#> 11 400 roads400
#> 12 400 railways400
#> 13 500 houses500
#> 14 500 roads500
#> 15 500 railways500
# replacing a pattern by zoi_radius
themes <- c("houses_XXX", "private_cabins_XXX", "roads_XXX", "powerlines_XXX", "railways_XXX")
maps <- c("houses_XXX@my_mapset", "private_cabins_XXX@my_mapset", "roads_summer_XXX@my_mapset",
"powerlines_XXX@my_mapset", "railway_XXX@my_mapset")
add_zoi_layers(layers = maps, zoi_radius = c(100, 500, 1000, 5000, 10000),
name = themes, pattern = "XXX")
#> name zoi_radius layer
#> 1 houses_100 100 houses_100@my_mapset
#> 2 private_cabins_100 100 private_cabins_100@my_mapset
#> 3 roads_100 100 roads_summer_100@my_mapset
#> 4 powerlines_100 100 powerlines_100@my_mapset
#> 5 railways_100 100 railway_100@my_mapset
#> 6 houses_500 500 houses_500@my_mapset
#> 7 private_cabins_500 500 private_cabins_500@my_mapset
#> 8 roads_500 500 roads_summer_500@my_mapset
#> 9 powerlines_500 500 powerlines_500@my_mapset
#> 10 railways_500 500 railway_500@my_mapset
#> 11 houses_1000 1000 houses_1000@my_mapset
#> 12 private_cabins_1000 1000 private_cabins_1000@my_mapset
#> 13 roads_1000 1000 roads_summer_1000@my_mapset
#> 14 powerlines_1000 1000 powerlines_1000@my_mapset
#> 15 railways_1000 1000 railway_1000@my_mapset
#> 16 houses_5000 5000 houses_5000@my_mapset
#> 17 private_cabins_5000 5000 private_cabins_5000@my_mapset
#> 18 roads_5000 5000 roads_summer_5000@my_mapset
#> 19 powerlines_5000 5000 powerlines_5000@my_mapset
#> 20 railways_5000 5000 railway_5000@my_mapset
#> 21 houses_10000 10000 houses_10000@my_mapset
#> 22 private_cabins_10000 10000 private_cabins_10000@my_mapset
#> 23 roads_10000 10000 roads_summer_10000@my_mapset
#> 24 powerlines_10000 10000 powerlines_10000@my_mapset
#> 25 railways_10000 10000 railway_10000@my_mapset