%in%.%nin% returns a logical vector indicating if elements of x
are not in table, This is the opposite of %in%.
%sub_in% returns the elements x that are %in%
table rather than a logical vector.
%sub_nin% returns the elements x that are %nin%
table rather than a logical vector.
x %nin% table
x %sub_in% table
x %sub_nin% tableNULL: the values to be matched. Long vectors
are supported.NULL: the values to be matched against.
Long vectors are not supported.