Input Ports
example set (exa) This input port expects an ExampleSet. Please make sure that all attributes
of the ExampleSet are binominal.
Output Ports
example set (exa) The ExampleSet that was given as input is passed without changing to the
output through this port. This is usually used to reuse the same ExampleSet in further
operators or to view the ExampleSet in the Results Workspace.
frequent sets (fre) The frequent itemsets are delivered through this port. Operators like the
Create Association Rules operator can use these frequent itemsets to generate association
rules.
Parameters
find min number of itemsets (boolean) If this parameter is set to true, this operator finds
at least the specified number of itemsets with highest support without taking the min support
parameter into account. This operator finds (at least) the number of itemsets specified
in the min number of itemsets parameter. The min support parameter is ignored to some
extent in this case. The minimal support is decreased automatically until the specified
minimum number of frequent itemsets is found. The defined minimal support is lowered
by 20 percent each time.
min number of itemsets (integer) This parameter is only available when the find min number
of itemsets parameter is set true. This parameter specifies the minimum number of
itemsets which should be mined.
max number of retries (integer) This parameter is only available when the find min number
of itemsets parameter is set true. This parameter determines how many times the operator
should lower the minimal support to find the minimal number of item sets. Each time the
minimal support is lowered by 20 percent.
positive value (string) This parameter determines which value of the binominal attributes
should be treated as positive. The attributes with that value are considered as part of a
transaction. If left blank, the ExampleSet determines which value is used.
min support (real) The minimum support criteria is specified by this parameter. Please study
the description of this operator for more information about minimum support.
max items (integer) This parameter specifies the upper bound for the length of the itemsets
i.e. the maximum number of items in an itemset. If set to -1, this parameter imposes no
upper bound.
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4. Modeling
must contain This parameter specifies the items that should be part of frequent itemsets. It
is specified through a regular expression. If there is no specific item that you want to have
in the frequent itemset, you can leave this blank.