The command sets a U-matrix to a graphic structure. The distances between neurons are described as the distances between rectangles in graphical presentation. See the command umat (Sect. 5.1.7) to know how U-matrices are computed.
Example (ex7.10): Three weights, "rm_w", "zn_w" and "age_w", are selected to the basis of distance computing. Then a U-matrix is computed and created to a graphic structure.
... NDA> somtr -d boston -sout s1 -l 5 NDA> mkgrp grp1 -s s1 ... NDA> select umatflds -f s1_W.rm_w s1_W.zn_w s1_W.age_w NDA> calcumat -s s1 -d umatflds -umat umat1 NDA> umat grp1 -umat umat1 ...
