The operation sets the places of the neurons related to the x-, y- or z-axis in three-dimensional space. Before using this command, the scale of the axis should have been computed by the command axis (Sect. 7.2.7). The reserved field names "som_x", "som_y" and "som_z" mean the places of the neurons related to the grid of the SOM.
Example (ex7.12): The following commands set the scales of the axes "x" and "y" to the absolute range [0,1]. Then neurons are located according to two weights "x_w" and "y_w". The layer is set to 3.
... NDA> somtr -d gauss.dat -sout som1 -l 5 NDA> mkgrp grp1 -s som1 NDA> nsize grp1 -v 0.2 NDA> topo grp1 -on NDA> axis grp1 -ax x -sca abs -min 0.0 -max 1.0 NDA> axis grp1 -ax y -sca abs -min 0.0 -max 1.0 NDA> nplc grp1 -ax x -f som1_W.x_w NDA> nplc grp1 -ax y -f som1_W.y_w NDA> layer grp1 -l 3 ...
