This function generates random points in an n-dimensional hypercube
and later projects them onto the surface of an n-dimensional unit
hypersphere or onto one of its main diagonal sectors (main diagonal
quadrant for **n=2**, octant for **n=3**, ...).

First the interval, from which the Kohonen weights for the initialization tasks are selected, is determined. Depending upon the initialization parameters, which have to be provided in field1 and field2, the interval may be , , or .

Every component of every Kohonen layer neuron j is then assigned a random value from the above interval, yielding weight vectors , which are random points within an n-dimensional hypercube.

The length of each vector is then normalized to 1.

All weights of the neurons of the Grossberg layer are set to 1.

Note that this initialization function does NOT produce weight vectors with equal point density on the hypersphere, because with increasing dimension of the hypercube in which the random dots are generated, many more points are originally in the corners of the hypercube than in the interior of the inscribed hypersphere.

Niels.Mache@informatik.uni-stuttgart.de

Tue Nov 28 10:30:44 MET 1995