The operation connects any item to a frame, but no type checking is done. Thus, the operation can be used for any type, also for the types of the data and classified data. It is necessary to use this option if fields of variable length are collected to a frame.
Example: The membership functions of the fuzzy sets are described in data fields of variable length. The following example demonstrates how a part of the defined fuzzy sets can be selected to compute fuzzy values for the data values later. (For creating fuzzy sets see Section 4.7.1 and related topics.)
... # create fuzzy structure and sets NDA> mkfz fz1... ... NDA> ls -fr fz1 fz1.sets fz1.sets.small fz1.sets.medium fz1.sets.large fz1.ranges ... NDA> select fz2.sets -n fz1.sets.small fz1.sets.large ... NDA> calcfz fz2 -f boston.dis -dout dis_fuzzy