RareSequence operator

The RareSequence operator finds seldom sequences in data streams. It's build for discrete values, e.g. states. It is important to have recurring tuples and therefore remove attributes from the tuples which make "equal" tuples unique. E.g., if you have a tuple with a counting number and a recurring state [(1, "state x"), (2, "state y"), (3, "state x"), (4, "state x"), ...], this operator won't work. In this case, you would need to use a projection to remove the counter to get tuples like [("state x"), ("state y"), ("state x"), ("state x")] with each "()" as a single tuple.

Example

stateAnalysis = RARESEQUENCE({
                    treedepth = 100,
                    minrelativefrequencyPath = 0.1,
                    firsttupleisroot = 'true',
                    UNIQUEBACKUPID = 'rareSequence_1'
                  },
                  state
                )

Using the backup functionality