Neural Network Toolbox

plotsom

Plot self-organizing map

Syntax

plotsom(pos)

plotsom(W,D,ND)

Description

plotsom(pos) takes one argument,

•           POS - NxS matrix of S N-dimension neural positions and plots the neuron positions with red dots, linking the neurons within a Euclidean distance of 1.

plotsom(W,d,nd) takes three arguments,

• W - SxR weight matrix.

  D - SxS distance matrix.

  ND - Neighborhood distance, default = 1.

and plots the neuron's weight vectors with connections between weight vectors whose neurons are within a distance of 1.

Examples

Here are some neat plots of various layer topologies:

• pos = hextop(5,6); plotsom(pos)
  pos = gridtop(4,5); plotsom(pos)
  pos = randtop(18,12); plotsom(pos)
  pos = gridtop(4,5,2); plotsom(pos)
  pos = hextop(4,4,3); plotsom(pos)
  

See newsom for an example of plotting a layer's weight vectors with the input vectors they map.

See Also

newsom, learnsom, initsom.

plotpv

plotv