get the confidence of this rule . concode_field_sep BitSet common concode_elem_sep boolean expandLR concode_elem_sep int maxLeft concode_elem_sep int count concode_elem_sep Integer[] itemset2 concode_elem_sep BitSet tids1 concode_elem_sep int maxRight concode_elem_sep Integer[] itemset1 concode_field_sep boolean equals concode_elem_sep String toString concode_elem_sep String toString concode_elem_sep int compareTo concode_elem_sep int getAbsoluteSupport concode_elem_sep Integer[] getItemset2 concode_elem_sep Integer[] getItemset1
double function ( ) { return ( ( double ) count ) / tids1 . cardinality ( ) ; }