dodgr_save_streetnet: Save a weighted streetnet to a local file

In dodgr: Distances on Directed Graphs

Save a weighted streetnet to a local file

Description

The weight_streetnet function returns a single data.frame object, the processing of which also relies on a couple of cached lookup-tables to match edges in the data.frame to objects in the original input data. It automatically calculates and caches a contracted version of the same graph, to enable rapid conversion between contracted and uncontracted forms. This function saves all of these items in a single .Rds file, so that a the result of a weight_streetnet call can be rapidly loaded into a workspace in subsequent sessions, rather than re-calculating the entire weighted network.

Usage

dodgr_save_streetnet(net, filename = NULL)

Arguments

net	data.frame or equivalent object representing the weighted network graph.
filename	Name with optional full path of file in which to save the input net. The extension .Rds will be automatically appended, unless specified otherwise.

Note

This may take some time if dodgr_cache_off has been called. The contracted version of the graph is also saved, and so must be calculated if it has not previously been automatically cached.

See Also

Other cache: clear_dodgr_cache(), dodgr_cache_off(), dodgr_cache_on(), dodgr_load_streetnet()

Examples

net <- weight_streetnet (hampi)
f <- file.path (tempdir (), "streetnet.Rds")
dodgr_save_streetnet (net, f)
clear_dodgr_cache () # rm cached objects from tempdir
# at some later time, or in a new R session:
net <- dodgr_load_streetnet (f)

dodgr documentation built on Sept. 11, 2024, 7:52 p.m.