R/locations.R

In jruwaard/emaph: The accompanying R package of the manual "Ecological Momentary Assessment in Mental Health Research"

#' locations
#'
#' @description Four-week Google location histories of two
#'    Dutch persons living in the Amsterdam area.
#'
#' @format A data frame with 14.753 observations on 4 variables:
#' \describe{
#'   \item{\code{id}}{Person id (integer)}
#'   \item{\code{timestamp}}{Datetime of measurement (POSIXct)}
#'   \item{\code{lat}}{Latitude (numeric)}
#'   \item{\code{lon}}{Longitude (numeric)}
#'   \item{\code{accuracy}}{Estimated GPS accuracy (in meters; smaller is better)}
#' }
#'
#' @source https://takeout.google.com/settings/takeout/custom/location_history
#'
#' @seealso get_google_location_data
#'
#' @docType data
#' @keywords datasets
#'
#' @examples
#' # number of assessments
#' nrow(locations)
#'
#' # number of assessments, per person
#' table(locations$id)
#'
#' library(ggplot2)
#' d <-  subset(locations,
#'              accuracy <= 100 &
#'              lon >=  4.80 & lon <=  5.00 &
#'              lat >= 52.25 & lat <= 52.50)
#'
#' ggplot(d, aes(lon, lat)) +
#'   geom_point(alpha = .1,  shape = 21, size = 3) +
#'   facet_wrap(~ id)
#'
"locations"