app_server              Defines logic for updating the app based on
                        user interaction in the ui
app_ui                  Defines a user interface for the 'shiny' app
boxplot_altitude        Generates a boxplot to visualize the
                        distribution of altitude by GPS.
boxplot_time_unit       Generates a boxplot to visualize the
                        distribution of time between GPS measurements
                        by GPS unit.
calc_bearing            Helper function for cleaning Columbus P-1
                        datasets. Given lat and long coords in degree
                        decimal, convert to radians and compute
                        bearing.
clean_batch_df          Cleans a directory of animal data files
clean_export_files      Cleans all animal GPS datasets (in .csv format)
                        in a chosen directory. Optionally exports the
                        clean data as spreadsheets, a single .rds data
                        file, or as a list of data frames
clean_location_data     Cleans a raw animal GPS dataset, implementing a
                        standardized procedure to remove impossible
                        values
clean_store_batch       Cleans a directory of animal data files and
                        stores them locally in rds format
compare_flags           Joins and reformats two animal data frames for
                        the purpose of flag comparison
compare_summarise_daily
                        Compares two animal datasets and calculates
                        daily summary statistics by GPS GPS, date, lat,
                        long, course, distance, rate, elevation column
                        names should match.
compare_summarise_data
                        Compares two animal data frames and calculates
                        summary statistics. GPS, date, lat, long,
                        course, distance, rate, elevation column names
                        should match.
deg_to_dec              Helper function for cleaning Columbus P-1
                        datasets. Given lat or long coords in degrees
                        and a direction, convert to decimal.
demo                    Demo animal GPS data from cows
demo_comparison         Demo comparison of two animal datasets
demo_filtered           Filtered demo animal GPS data from cows
demo_filtered_elev      Filtered demo animal GPS data from cows with
                        elevation appended at zoom 1
demo_info               Raw demo animal GPS data from cows with
                        information
demo_meta               Metadata for demo animal GPS data from cows
demo_unfiltered         Unfiltered demo animal GPS data from cows
demo_unfiltered_elev    Unfiltered demo animal GPS data from cows with
                        elevation appended at zoom 1
detect_peak_modz        Alternative implementation of the robust peak
                        detection algorithm by van Brakel 2016
dev_add_to_gitignore    Add big files to a .gitignore file
get_data_from_meta      Get animal data set from specified meta.  If
                        date range is invalid, automatically returns
                        all animal data specified by meta_df.
get_file_meta           Generate metadata for a directory of animal
                        data files
get_meta                Generate metadata for an animal data frame -
                        filename, site, date min/max, animals, min/max
                        lat/longitude, storage location
histogram_animal_elevation
                        Generate a histogram of the distribution of
                        modeled elevation - measured altitude
histogram_time          Generates a histogram to visualize the
                        distribution of time between GPS measurements.
histogram_time_unit     Generates a histogram to visualize the
                        distribution of time between GPS measurements
                        by GPS unit.
join_summaries          Joins two animal data frame summaries by a
                        column and appends differences
line_compare            Compares moving averages of a variable for two
                        datasets over time, grouped by GPS GPS, Date,
                        and col columns should match
lookup_elevation_aws    Add elevation data from public AWS terrain
                        tiles to long/lat coordinates of animal gps
                        data
lookup_elevation_file   Add elevation data from terrain tiles to
                        long/lat coordinates of animal gps data
process_elevation       Process and optionally export modeled elevation
                        data from existing animal data file
qqplot_time             Generates a QQ plot to show the distribution of
                        time between GPS measurements.
quantile_time           Determines the GPS measurement time value
                        difference values roughly corresponding to
                        quantiles with .05 intervals.
read_columbus           Read and process a Columbus P-1 data file
                        containing NMEA records into a data frame
read_gps                Reads a GPS dataset of unknown format at
                        location filename
read_zip_to_rasters     Read an archive of altitude mask files and
                        convert the first file into a raster object
run_shiny_animaltracker
                        Run the animaltracker 'shiny' app by calling
                        this function. Depending on the size of input
                        files, it may be advisable to increase the
                        maximum request size.
run_validation_app      Run the 'shiny' validation app. Depending on
                        the size of input files, it may be advisable to
                        increase the maximum request size.
save_meta               Save metadata to a data frame and return it
store_batch_list        Generates basic metadata about a directory of
                        animal data files and stores the files as data
                        frames as a list with the meta
summarise_anidf         Calculates summary statistics for an animal
                        data frame
summarise_col           Get summary statistics for a single column in
                        an animal data frame
summarise_unit          Summarise a number of animal datasets by GPS
                        unit
violin_compare          Compares summary statistics from two datasets
                        as side-by-side violin plots
