Re: error: value on right hand side of assignment is undefined
From:
Ian McCallion
Subject:
Re: error: value on right hand side of assignment is undefined
Date:
Fri, 7 Aug 2020 09:45:08 +0100
On Friday, 7 August 2020, andetroy <andetroy@gmail.com> wrote: > I have been attempting to run a script that calls a function but I keep > getting the following error: "value on right hand side of assignment is > undefined". The script and function code are shown below respectively. > > input = [ 0 0 1;0 1 1;1 0 1;1 1 1]; > correct_output = [0;0;1;1]; > Weight = 2*rand(1,3) - 1; > for epoch = 1:10000 > Weight = SGD_method(Weight, input, correct_output) > endfor > > save('Trained_Network.mat') > > > the function > > function SGD_method(Weight, input, correct_output) > alpha = 0.9; > > N = 4; > for k = 1:N > transposed_Input = input(k, :)'; > d = correct_output(k); > weighted_Sum = Weight*transposed_Input; > output = sigmoid(weighted_Sum); > > error = d - output; > delta = output*(1-output)*error; > > dWeight = alpha*delta*transposed_Input; > > Weight(1) = Weight(1) + dWeight(1); > Weight(2) = Weight(2) + dWeight(2); > Weight(3) = Weight(3) + dWeight(3); > endfor > endfunction > > > Please provide assistance
You do not say which line the error occurs on, but perhaps the problem is you have not defined the sigmoid function?