| is_unique {validate} | R Documentation |
Utility function to make common tests easier.
is_unique(...) all_unique(...)
... |
When used in a validation rule: a bare (unquoted) list of variable names. When used directly, a comma-separated list of vectors of equal length. |
For is_unique A logical vector that is FALSE for each record
that has a duplicate.
For all_unique a single TRUE or FALSE.
# check that height-weight combinations are unique
d <- data.frame(X = c('a','b','c','b'), Y = c('banana','apple','banana','apple'), Z=1:4)
v <- validator(is_unique(X, Y))
values(confront(d, v))