How do I know I had the exact plotsomhits after training SOM ?

 Hai, I am currently doing hand signal recognition using SOM... 
I had trained 290 images for hand signal with 40x30 size in grayscale using SOM, after the SOM training I figure out how to check each images hit on the map netowrk then I want to know If i had the correct one?

How do i know it?any other code? what i have here is graphical representation of plotsomhits each group of image...

any help please?

check out mine..

Data4Training(:,1) x = Data4Training(:,1) x size(x) out = sim(net,Data4Training(:,1)) val=num2str(out); plotsomhits(net,x)