2. The method of claim 1 , said transactions comprising transactions in a retail domain among customers buying products at retailers in successive visits, each visit resulting in a transaction of a set of one or more products; wherein retail transaction data comprise a time stamped sequence of market baskets.
2. The method of claim 1 , said transactions comprising transactions in a retail domain among customers buying products at retailers in successive visits, each visit resulting in a transaction of a set of one or more products; wherein retail transaction data comprise a time stamped sequence of market baskets. 7. The method of claim 2 , wherein a set of all customers, their organization in various segments, and all additional information known about customers comprises a customer space.