self-organizing map plotting help

I have tried two years to plot Som map (self-organizing map);but I can't do it with matlab

this is my program (I want plot the position of the input [1 0] in the map) please help me

I have read help plotsom, doc , nothing to do this

p1=[1 1]'; p2=[1 2]'; p3=[2 -1]'; p4=[2 -2]'; p5=[-1 2]'; p6=[-2 1]'; p7=[-1 -1]'; p8=[-2 -2]';
P=[p1 p2 p3 p4 p5 p6 p7 p8];
% Create a Self-Organizing Map
dimension1 = 10;
dimension2 = 10; 
net = selforgmap([dimension1 dimension2]);
% Train the Network
[net,tr] = train(net,P); 
% Test the Network
outputs = net(P);
% View the Network
view(net)
%test
A=sim(net,[1 0]);
%plot Som map
axis([0 10 0 10]);
%hold on; plotting A in the Map
circles = plot(A,'ob');

[mouh nyquist]

plz

[Geoff Hayes]

Mouh - I think that you need to provide more details. What do you mean when you say that you can't do it with matlab? Are you observing errors (and if so, what are they) or are you just not getting the results that you desire?

[mouh nyquist]

thank you for your interesting to my question; I cant't do it with matlab ; I can't see the results of SOM in matlab; I can only training the SOM and I can't test the SOM ; I thing the SOM of matlab is not complet

Answer 1

[Greg Heath]

>> szout = size(outputs) % [ 100 8 ]

uniqueout = unique(outputs) % [ 0 1 ]

szout =

   100     8

uniqueout =

     0
     1

>> findones = find(outputs == 1)

findones =

     7
   103
   221
   341
   405
   523
   611
   701

These can be converted to the positions of the training data in the 10 x 10 matrix.

similarly,

>> size(net([ 1 0]))

ans =

   100     2

You can calculate the position .

However, I cannot make any sense of most of the plotsom routines.

Sorry,

Greg

[mouh nyquist]

thank you a lot .that help me a lot; please if you can tell me how I can test this self-organizing map for exemple with this data [-2 2]

[mouh nyquist]

the self-organizing map of matlab; we can only training? not testing the map

[Greg Heath]

y = net([-2 2]) will give you a 1x2 answer just like above for [ 1 0 ].

[mouh nyquist]

thank you a lot , but when I use this; they give me two circles in the map (must have one circle in the map)

    y = net([-2 2]);
    %plot Som map
    axis([0 10 0 10]);
    %hold on; plotting A in the Map
    circles = plot(y(:,1),y(:,2),'ob');

[mouh nyquist]

thank you a lot , but when I use this; they give me two circles in the map (must have one circle in the map)

    y = net([-2 2]);
    %plot Som map
    axis([0 10 0 10]);
    %hold on; plotting A in the Map
    circles = plot(y(:,1),y(:,2),'ob');