MATLAB: What is the purpose of each line of this code

Question

This is a code for training Neural Network:

function [net]=createff(Iin,Target)
net = newff(Iin, Target, 10, {'logsig' 'logsig'}, 'trainscg');
net.trainParam.perf = 'sse';
net.trainParam.epochs = 500;
net.trainParam.goal = 1e-5;
net.trainParam.lr=0.15;
net.trainParam.mc=0.8;
net = init(net);
net = train(net, Iin, Target);
end

Please help me to understand this code.

Answer 1

The first line creates a feed-forward backpropagation network. Type this in the command window to learn more:

help newff

• '10' is the size of the hidden layer
• 'logsig' is log sigmoid transfer function
• 'trainscg' is scaled conjugate gradient backpropagation
• 'sse' is sum of squared errors
• 'epochs' refers to how many times to run through the training and validation sets
• 'goal' is the stopping criterion
• 'lr' is the learning rate
• 'mc' is the momentum constant

The last two lines initialize and train the network.

help init
help train