View source: R/contains_exactly.R
contains_exactly  R Documentation 
Check if the specified activity is present (contained) in a case for exactly n
times.
The contains_exactly
rule examines whether the supplied activity
is present in a case for an exact number of n
times.
contains_exactly(activity, n = 1)
activity 

n 

Other Cardinality rules:
absent()
,
contains_between()
,
contains()
library(bupaR) library(eventdataR) # Each patient should have exactly one registration activity instance. patients %>% check_rule(contains_exactly("Registration", n = 1))
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