Check if the specified activity is absent from a case.
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.
n = 0, an activity is not allowed to occur even a single time. The maximum number of times it is allowed to occur is
absent(activity, n = 0)
Other Cardinality rules:
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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