Home > Model Nodes > Association Node > Behavior of Association Node
By default, an Association node builds one model using the Apriori algorithm.
The Apriori algorithm assumes that the data is transactional and that the data has many missing values. Apriori interprets all missing values as sparse data, and it has its own mechanisms for handling sparse data.
All models in the node have the same Case ID, Item ID, and Item Value. Case ID can be two columns. For example, for data source SH.SALES
, CUST_ID
and TIME_ID
combined can be the Case ID.
No automatic data preparation is done for an Association node. If you select a value for Item Value that is different from the default <Existence>
, you may have to prepare the data.
For more information see Data for AR Models.