try\demo
...\....\ball.m
...\....\cross.m
...\....\disc.m
...\....\niceball.m
...\....\nicecross.m
...\....\nicecube.m
...\....\nicedisc.m
...\....\nicering.m
...\....\nicesquare.m
...\....\plot_nodes.m
...\....\plot_points.m
...\....\ring.m
...\....\somdemo.m
...\ReadMe
...\src
...\...\closest.m
...\...\eucdist.m
...\...\index_of_closest.m
...\...\mag.m
...\...\pickrand.m
...\...\randindex.m
...\...\scale.m
...\...\som.m
...\...\somlearn.m
...\...\update_weights.m
try