inst/doc/travel_time_matrix.R

In r5r: Rapid Realistic Routing with 'R5'

## ----include = FALSE----------------------------------------------------------
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  eval = identical(tolower(Sys.getenv("NOT_CRAN")), "true"),
  out.width = "100%"
)

## removes files previously created by 'setup_r5()'
#data_path <- system.file("extdata/poa", package = "r5r")
#existing_files <- list.files(data_path)
#files_to_keep <- c(
#  "poa_hexgrid.csv",
#  "poa_osm.pbf",
#  "poa_points_of_interest.csv",
#  "poa_eptc.zip",
#  "poa_trensurb.zip",
#  'fares'
#  )
#files_to_remove <- existing_files[! existing_files %in% files_to_keep]
#invisible(file.remove(file.path(data_path, files_to_remove)))

## ----message = FALSE----------------------------------------------------------
# increase Java memory
options(java.parameters = "-Xmx2G")

# load libraries
library(r5r)
library(data.table)
library(ggplot2)

# build a routable transport network with r5r
data_path <- system.file("extdata/poa", package = "r5r")
r5r_core <- setup_r5(data_path)

# routing inputs
mode <- c('walk', 'transit')
max_trip_duration <- 60 # minutes

# departure time
departure_datetime <- as.POSIXct("13-05-2019 14:00:00", 
                                 format = "%d-%m-%Y %H:%M:%S")

# load origin/destination points
points <- fread(file.path(data_path, "poa_points_of_interest.csv"))


## ----message = FALSE----------------------------------------------------------
# estimate travel time matrix
ttm <- travel_time_matrix(r5r_core,   
                          origins = points,
                          destinations = points,    
                          mode = mode,
                          max_trip_duration = max_trip_duration,
                          departure_datetime = departure_datetime )

head(ttm, n = 10)


## ----message = FALSE----------------------------------------------------------
ettm <- expanded_travel_time_matrix(r5r_core,   
                                    origins = points,
                                    destinations = points,    
                                    mode = mode,
                                    max_trip_duration = max_trip_duration,
                                    departure_datetime = departure_datetime )

head(ettm, n = 10)

## ----message = FALSE----------------------------------------------------------
ettm2 <- expanded_travel_time_matrix(r5r_core,   
                                    origins = points,
                                    destinations = points,    
                                    mode = mode,
                                    max_trip_duration = max_trip_duration,
                                    departure_datetime = departure_datetime,
                                    breakdown = TRUE)

head(ettm2, n = 10)

## ----message = FALSE----------------------------------------------------------
ettm_window <- expanded_travel_time_matrix(r5r_core,   
                                           origins = points,
                                           destinations = points,    
                                           mode = mode,
                                           max_trip_duration = max_trip_duration,
                                           departure_datetime = departure_datetime,
                                           breakdown = TRUE,
                                           time_window = 10)

ettm_window[15:25,]

## ----message = FALSE----------------------------------------------------------
r5r::stop_r5(r5r_core)
rJava::.jgc(R.gc = TRUE)

## ----eval = TRUE, include = FALSE, message = FALSE----------------------------
# clean cache (CRAN policy)
r5r::r5r_cache(delete_file = 'all')