()-indexing must appear last in an index expression.

Do you know whats wrong with my indexing below?

I'm trying to implement a simple neural network and get ()-indexing must appear last in an index expression.

function forward

node_input(0)=in;

node_output(0)=in;

while (1<=layer) &&(layer<=2)

    while j<=ncount(layer)

    node_input(layer)(j)=weights(layer-1)(ncount(layer-1),j); 

        while i<ncount(layer-1)

        node_input(layer)(j)=subs(node_input(layer)(j),node_input(layer)(j),node_input(layer)(j)+(node_output(layer-1)(i)*weights(layer-1)(i,j)))

        node_input(layer)(j)=subs(node_input(layer)(j),node_input(layer)(j),node_input(layer)(j)+(weights(layer-1)(ncount(layer-1)*node_output(layer-1)(ncount(layer-1)),j)))

        end

    end

end

while layer<2

    node_output(layer)(j)=my_sigmoid(node_input(layer)(j))

end

for layer=2

    node_output(layer)(j)=node_input(layer)(j)

end

end

Thanks

Answer 1

[Sean de Wolski]

MATLAB does not support cascaded indexing. You'll need to either create a new variable and index into it or use an anonymous function to grab what you want:

x = rand(10,1)
f = @(x)x(end) % grab end

f(x+10) % end of an expression