Load the package other packages used in this vignette.
The gt_get_data function downloads the compressed eruptions data from https://geysertimes.org/archive/, reads the data compressed data into R and saves version of the R object in the location specified in the dest_folder argument to the function. The default location for dest_folder is file.path(tempdir(), "geysertimes")). This default location is used to meet the CRAN requirement of not writing files by default to any location other than under tempdir().
default_path <- gt_get_data()
#> Set dest_folder to geysertimes::gt_path() so that data persists between R sessions.Users are encouraged to set dest_folder to the value given by gt_path() which is a permanent location appropriate for the user on the particular platform.
If a permanent location is used, the user only needs to get the data once. Using the suggested value for dest_folder:
The gt_load_eruptions is used to load the eruptions data in the current session. The gt_load_geysers loads the geyser location data in the current session.
A quick look at the data:
dim(eruptions)
#> [1] 1292133 25
names(eruptions)
#> [1] "eruption_id" "geyser" "time"
#> [4] "has_seconds" "exact" "near_start"
#> [7] "in_eruption" "electronic" "approximate"
#> [10] "webcam" "initial" "major"
#> [13] "minor" "questionable" "duration"
#> [16] "duration_seconds" "duration_resolution" "duration_modifier"
#> [19] "entrant" "observer" "comment"
#> [22] "time_updated" "time_entered" "primary_id"
#> [25] "other_comments"The data that is downloaded is versioned. The version id is the date when the data was downloaded.
The gt_version() lists the latest version of the data that has been downloaded. Setting all=TRUE will list all versions of the data that have been downloaded.
Geysers with the most recorded eruptions:
print(n=20,
eruptions %>% group_by(geyser) %>% summarise(N=n()) %>% arrange(desc(N)))
#> # A tibble: 450 x 2
#> geyser N
#> <chr> <int>
#> 1 Old Faithful 184096
#> 2 Plume 143792
#> 3 Daisy 99807
#> 4 Little Cub 96889
#> 5 Lion 63418
#> 6 Grand 41475
#> 7 Aurum 35881
#> 8 Oblong 34080
#> 9 Fountain 27463
#> 10 Spouter 26981
#> 11 Riverside 26678
#> 12 Castle 25787
#> 13 Logbridge 23416
#> 14 Plate 21594
#> 15 Echinus 21330
#> 16 Depression 20668
#> 17 Turban 18885
#> 18 Great Fountain 18880
#> 19 Grotto 17533
#> 20 Jet 16368
#> # ... with 430 more rows