Internal S3 object, stores lazy reference to original visit data.
Usage
orivisit(
df_visit,
call = NULL,
env = parent.frame(),
event_names = c("event"),
col_names = list(study_id = "study_id", site_id = "site_id", patient_id = "patient_id",
visit = "visit")
)Arguments
- df_visit
Data frame with columns: study_id, site_number, patnum, visit, n_ae.
- call
optional, provide call, Default: NULL
- env
Optional, provide environment of original visit data. Default: parent.frame().
- event_names
vector, contains the event names, default = "event"
- col_names
named list, indicate study_id, site_id, patient_id and visit column in df_visit input dataframe. Default: list( study_id = "study_id", site_id = "site_id", patient_id = "patient_id", visit = "visit" )
Details
Saves variable name of original visit data, checks whether it can be retrieved from parent environment and stores summary. Original data can be retrieved using as.data.frame(x).
Examples
df_visit <- sim_test_data_study(
n_pat = 100,
n_sites = 5,
ratio_out = 0.4,
factor_event_rate = - 0.6
)#'
visit <- orivisit(df_visit)
object.size(df_visit)
#> 131576 bytes
object.size(visit)
#> 3544 bytes
as.data.frame(visit)
#> # A tibble: 1,932 × 9
#> patient_id site_id is_out max_visit_mean max_visit_sd event_per_visit_mean
#> <chr> <chr> <lgl> <dbl> <dbl> <dbl>
#> 1 P000001 S0001 TRUE 20 4 0.141
#> 2 P000001 S0001 TRUE 20 4 0.141
#> 3 P000001 S0001 TRUE 20 4 0.141
#> 4 P000001 S0001 TRUE 20 4 0.141
#> 5 P000001 S0001 TRUE 20 4 0.141
#> 6 P000001 S0001 TRUE 20 4 0.141
#> 7 P000001 S0001 TRUE 20 4 0.141
#> 8 P000001 S0001 TRUE 20 4 0.141
#> 9 P000001 S0001 TRUE 20 4 0.141
#> 10 P000001 S0001 TRUE 20 4 0.141
#> # ℹ 1,922 more rows
#> # ℹ 3 more variables: visit <int>, n_event <dbl>, study_id <chr>