MATLAB Neural Network - Forward Propagation

Question

Erica Dos Santos Saraiva 2021-7-24

0
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https://ww2.mathworks.cn/matlabcentral/answers/885184-matlab-neural-network-forward-propagation

评论： Erica Dos Santos Saraiva 2021-7-28

I am trying to implement a forward propogation with a foor loop as advices on neural smithing. I keep recieveing an error when iterating through my for loop. How do I get rid of this error.

I have checked the sizes for both NOUTPUTS(i+1) and NPATS(i) which both are = 1 however keep receiving this error.

Patterns = x'; Desired = y; NHIDDENS = 1; prnout=Desired;
% Patterns become x so number of inputs becomes size of patterns
[NINPUTS,NPATS] = size(Patterns); [NOUTPUTS,NP] = size(Desired);
%apply the backprop here...
LearnRate = 0.15; Momentum = 0; DerivIncr = 0; deltaW1 = 0; deltaW2 = 0;
% Keeps the tan ordering of the examples of x
Inputs1= [Patterns;ones(1,NPATS)]; %Inputs1 = [ones(1,NPATS); Patterns];
% Weight initialisation
Weights1 = 0.5*(rand(NHIDDENS,1+NINPUTS)-0.5);
Weights2 = 0.5*(rand(1,1+NHIDDENS)-0.5); 
TSS_Limit = 0.02;
for epoch = 1:10
    
%     FORWARD LOOP 
size(NOUTPUTS)
size(NPATS)
    for ii = 0: ii < length(NINPUTS)
        NOUTPUTS(ii+1) = NPATS(ii);
%         Sets bias to 1
        NOUTPUTS(1) = 1;
    end
    for ii = NHIDDENS: ii < NINPUTS 
        sum = 0;
        for ij = 0: ij < ii
            sum = sum + deltaW1(ii,ij) * NOUTPUTS(ij);
            NOUTPUTS(ii) = tanh(sum);
        end
            
    end
   

Unable to perform assignment because the
left and right sides have a different
number of elements.
Error in mlpts (line 66)
        NOUTPUTS(i+1) = NPATS(i);