#' Read Dir of .GPX Files to R Dataframe
#' @name gpx_dir_to_df
#' @param dir The directory where you have saved your .gpx files.
#' @return A dataframe the .gpx data. The dataframe contains information
#' about latitude, longitude, elevation, datetime, activity,
#' the activity type, miles and kilometer splits for the activity.
#' @export
gpx_dir_to_df <- function(dir) {
dir_files <- list.files(dir, full.names = TRUE)
gpx_files <- dir_files[grepl("\\.GPX", toupper(dir_files))]
track_list <- list()
for (i in seq_along(gpx_files)) {
message(sprintf("Parsing %s", gpx_files[i]))
xml_file <- xml2::xml_ns_strip(xml2::read_xml(gpx_files[i]))
xml_tracks <- xml2::xml_find_all(xml_file, ".//trk")
track_list[i] <- parse_tracks(xml_tracks, i)
}
df <- gpx_list_to_df(track_list)
aug_df <- augment_by_activity(df)
colnames(aug_df) <- c("latitude",
"longitude",
"elevation",
"datetime",
"activity",
"activity_type",
"activity_id",
"cumulative_distance",
"split_mile",
"split_km")
return(aug_df)
}
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