get_system_alerts grabs and tidies the system_alerts feed for a given city.
This feed informs users about changes to normal operation. Metadata for this
dataset can be found at: https://github.com/MobilityData/gbfs/blob/master/gbfs.md
get_system_alerts(
city,
directory = NULL,
file = "system_alerts.rds",
output = NULL
)A character string that can be matched to a gbfs feed. The recommended argument is a system ID supplied in the output of [get_gbfs_cities()], but will also attempt to match to the URL of an active .json feed or city name.
Optional. Path to a folder (or folder to be created) where the feed will be saved.
Optional. The name of the file to be saved (if output
is set to "save" or "both"), as a character string.
Must end in ".rds".
Optional. The type of output method. If left as default, this
argument is inferred from the directory argument. If
output = "save", the object will be saved as an .rds object at
# the given path. If output = "return", the output will be returned
as a dataframe object. Setting output = "both" will do both.
The output of this function depends on argument to output
and directory. Either a saved .rds object generated from the current
feed, a dataframe object, or both.
[get_gbfs()] for a wrapper to call each of the get_feed
functions, [get_gbfs_cities()] for a dataframe of cities releasing gbfs
functions, and [get_which_gbfs_feeds()] for a dataframe of which feeds
are released by a given city.
# grab the system alerts feed for portland, oregon
get_system_alerts(city =
"https://gbfs.lyft.com/gbfs/1.1/pdx/en/system_alerts.json",
output = "return")
#> data frame with 0 columns and 0 rows