stplanr: od_id_order – R documentation

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od_id_order

Generate ordered ids of OD pairs so lowest is always first This function is slow on large datasets, see szudzik_pairing for faster alternative

Description

Generate ordered ids of OD pairs so lowest is always first This function is slow on large datasets, see szudzik_pairing for faster alternative

Usage

od_id_order(x, id1 = names(x)[1], id2 = names(x)[2])

Arguments

`x`	A data frame or SpatialLinesDataFrame, representing an OD matrix
`id1`	Optional (it is assumed to be the first column) text string referring to the name of the variable containing the unique id of the origin
`id2`	Optional (it is assumed to be the second column) text string referring to the name of the variable containing the unique id of the destination

Examples

x <- data.frame(id1 = c(1, 1, 2, 2, 3), id2 = c(1, 2, 3, 1, 4))
od_id_order(x) # 4th line switches id1 and id2 so stplanr.key is in order

stplanr

Sustainable Transport Planning

v0.8.2

MIT + file LICENSE

Authors

Robin Lovelace [aut, cre] (<https://orcid.org/0000-0001-5679-6536>), Richard Ellison [aut], Malcolm Morgan [aut] (<https://orcid.org/0000-0002-9488-9183>), Barry Rowlingson [ctb], Nick Bearman [ctb], Nikolai Berkoff [ctb], Scott Chamberlain [rev] (Scott reviewed the package for rOpenSci, see https://github.com/ropensci/onboarding/issues/10), Mark Padgham [ctb], Andrea Gilardi [ctb] (<https://orcid.org/0000-0002-9424-7439>)

Initial release