Tut 4

Question 1

Hyperbolic tangent sigmoid function

Answer 1

Question 2

Process for calculating output of hidden units in RBF

Answer 2

If need to calculate σ, σ_j = ρ_max/sqrt(2 x n_h) unless otherwise specified where n_h is number of hidden units (this is for Gaussian function)

Then for each hidden unit h_j(y_i) = f(abs(y_i - c_j)) where f(.) is the specified function (in this case Gaussian)