การเพิ่มข้อมูล: สถิติสรุปของเส้นทาง

library(trelliscopejs)
library(ggplot2)
library(dplyr)

# Function to construct a Google maps URL with cycling directions
make_gmap_url <- function(start_lat, start_lon, end_lat, end_lon) {
  paste0("https://www.google.com/maps/dir/?api=1",
    "&origin=", start_lat, ",", start_lon,
    "&destination=", end_lat, ",", end_lon,
    "&travelmode=bicycling")
}

# Compute tot_rides, weekday_diff, and map_url
route_hod_updated <- route_hod %>% ungroup() %>%
  group_by(start_station_code, end_station_code) %>%
  mutate(
    tot_rides = sum(___),
    weekday_diff = mean(n[weekday == "workweek"]) - ___,
    map_url = ___)