Check if an 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 |
The activity to check. Character vector of length one. |
n |
n is the allowed number of occurences of the activity. E.g. n = 0 means the activity should be absent, n = 1 means it is allowed to occur once. |
Other Declarative Rules:
and(),
contains_between(),
contains_exactly(),
contains(),
ends(),
precedence(),
responded_existence(),
response(),
starts(),
succession(),
xor()
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))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.