Converts wts data in list form into a 3 dimensional array
Matrix with weights in the 2nd dimension(not list() like in R)
Lines/Height of the desired grid
Columns/Width of the desired grid
3 dimensional array containing the weights of the neural grid. For a more general explanation see reference
One could describe this function as a transformation or a special case of long to wide format, see also EsomNeuronsAsList
Ultsch, A.: Maps for the visualization of high-dimensional data spaces, Proc. Workshop on Self organizing Maps (WSOM), pp. 225-230, Kyushu, Japan, 2003.