Combine the edge weights of two or more travelcost graphs

Combine the edge weights of two or more travelcost graphs

tc_combine_edge_weights(..., fun = "*")

Arguments

...	: two or more tc_graph objects, or a list of such objects
fun	function or string: the function (or function name) to be used to combine the edge weights. The function must operate on sparse matrices as returned by Matrix::sparseMatrix()

Value

A tc_graph object, which is the first object in ... but with edge weights modified

See also

tc_build_graph(), tc_combine_edge_weights()

Examples

my_raster <- raster::raster(ext = raster::extent(c(152.75, 155.25, -56.25, -54.25)),
                            res = c(0.5, 0.5), crs = "+proj=longlat")
g <- tc_build_graph(my_raster)
## set random edge weights
g1 <- tc_set_edge_weights(g, values = runif(sum(tc_adj_matrix(g) > 0)))
g2 <- tc_set_edge_weights(g, values = runif(sum(tc_adj_matrix(g) > 0)))
## sum of those two
g3 <- tc_combine_edge_weights(g1, g2, fun = "+")