Widrow Nguyen MATLAB implementation - matlab

Question

I tried to implement the Widrow - Nguyen weight initialization on MATLAB 2014a. to compare its performance against HARD RANDOM weight init technique.
a = -1;
b = 1;
% WIDROW weights for Layer Input to Hidden Layer 1
sum_sq_wts = 0;
for k=1:30
iw(:,:) = zeros(num_input, nodes_hidden_layer);
for i=1:num_input
for j=1:nodes_hidden_layer
iw(i,j)=(b-a)*rand(1,1) + a;
sum_sq_wts = sum_sq_wts + (iw(i,j)*iw(i,j));
end
end
norm = sqrt(sum_sq_wts);
beta = 0.7*nodes_hidden_layer.^(1/num_input);
for i=1:num_input
for j=1:nodes_hidden_layer
iw(i,j) = beta*iw(i,j)/norm;
end
end
IW{k}=iw';
end
% WIDROW weights for Hidden Layer 1 to output Layer
sum_sq_wts = 0;
for k=1:30
lw(:,:) = zeros(nodes_hidden_layer,1);
for i=1:nodes_hidden_layer
for j=1:1
iw(i,j)=(b-a)*rand(1,1) + a;
sum_sq_wts = sum_sq_wts + iw(i,j)*iw(i,j);
end
end
norm = sqrt(sum_sq_wts);
beta = 0.7*nodes_hidden_layer.^(1/num_input);
for i=1:nodes_hidden_layer
for j=1:1
lw(i,j) = beta*lw(i,j)/norm;
end
end
LW{k}=lw';
end
WidNgu{1,1} = IW;
WidNgu{1,2} = LW;
I am generating 30 different set of Widrow weights in the above code. The problem is that the weights generated by the above code generate a lesser performance value for a neural network trained using them as compared to the random set of weights. The problem i used to train was a simple function approx prob.
One thing more interesting i observe is that, the first weight set generated by the above, at times performs better than the random weight approach, but the rest 29 sets that i created are always poor performing.
Where have i gone wrong in this??