flag_event ObjectThe flag_event object is used to define events as input for the
derive_var_merged_ef_msrc() function.
flag_event(dataset_name, condition = NULL, by_vars = NULL)Dataset name of the dataset to be used as input for the
event. The name refers to the dataset specified for source_datasets in
derive_var_merged_ef_msrc().
Permitted Values: a character scalar
Condition
The condition is evaluated at the dataset referenced by dataset_name. For
all by groups where it evaluates as TRUE at least once the new variable
is set to the true value (true_value).
Grouping variables
If specified, the dataset is grouped by the specified variables before the
condition is evaluated. If named elements are used in by_vars like
by_vars = exprs(USUBJID, EXLNKID = ECLNKID), the variables are renamed
after the evaluation. If the by_vars element is not specified, the
observations are grouped by the variables specified for the by_vars
argument of derive_var_merged_ef_msrc().
derive_var_merged_ef_msrc()
Source Objects:
basket_select(),
censor_source(),
death_event,
event(),
event_joined(),
event_source(),
query(),
records_source(),
tte_source()