dtribas (Neural Network Toolbox)

Derivative of triangular basis transfer function

dA_dN = dtribas(N,A)

dtribas is the derivative function for tribas.

dtribas(N,A) takes two arguments,

N - S x Q net input.

A - S x Q output.

and returns the S x Q derivative dA/dN.

Examples

Here we define the net input N for a layer of 3 tribas neurons.

N = [0.1; 0.8; -0.7];

We calculate the layer's output A with tribas and then the derivative of A with respect to N.

A = tribas(N)
dA_dN = dtribas(N,A)

The derivative of tribas is calculated as follows:

d = 1, if -1 <= n < 0; -1, if 0 < n <= 1; 0, Otherwise.