od_filter: Filter OD datasets

In Robinlovelace/od: Manipulate and Map Origin-Destination Data

Filter OD datasets

Description

This function takes and OD dataset and a character vector of codes and returns an OD dataset with rows matching origin and destinations zones present in the codes.

Usage

od_filter(x, codes, silent = FALSE)

Arguments

x	A data frame in which the first two columns are codes representing points/zones of origin and destination
codes	The zone codes that must be in origins and destination
silent	Hide messages? FALSE by default.

Value

A data frame

Examples

x = od_data_df
z = od_data_zones
codes = z[[1]]
z_in_x_o = codes %in% x[[1]]
z_in_x_d = codes %in% x[[2]]
sum(z_in_x_d)
sum(z_in_x_o)
z = z[which(z_in_x_o | z_in_x_d)[-1], ]
z[[1]]
unique(c(x[[1]], x[[2]]))
try(od_to_sf(x, z)) # fails
nrow(x)
x = od_filter(x, z[[1]])
nrow(x)
od_to_sf(x, z)

Robinlovelace/od documentation built on Dec. 8, 2022, 7:21 a.m.