| absent | R Documentation |
Check if the specified activity is absent from a case.
The absent rule can be used to check whether an activity is absent in a case or not. The n parameter can be configured to create a different level of absence.
When n = 0, an activity is not allowed to occur even a single time. The maximum number of times it is allowed to occur is n.
absent(activity, n = 0)
activity |
|
n |
|
Other Cardinality rules:
contains_between(),
contains_exactly(),
contains()
library(bupaR)
library(eventdataR)
# Check for which patients the activity "MRI SCAN" is absent.
patients %>%
check_rule(absent("MRI SCAN"))
# Check for which patients the activity "Blood test" occurs maximum a single time,
# but not 2 times or more.
patients %>%
check_rule(absent("Blood test", n = 1))
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