Function fann_sys::fann_set_activation_function

pub unsafe extern "C" fn fann_set_activation_function(
    ann: *mut fann, 
    activation_function: fann_activationfunc_enum, 
    layer: c_int, 
    neuron: c_int
)

Set the activation function for neuron number neuron in layer number layer, counting the input layer as layer 0.

It is not possible to set activation functions for the neurons in the input layer.

When choosing an activation function it is important to note that the activation functions have different range. FANN_SIGMOID is e.g. in the 0 - 1 range while FANN_SIGMOID_SYMMETRIC is in the -1 - 1 range and FANN_LINEAR is unbounded.

Information about the individual activation functions is available at fann_activationfunc_enum.

The default activation function is FANN_SIGMOID_STEPWISE.

See also

fann_set_activation_function_layer, fann_set_activation_function_hidden, fann_set_activation_function_output, fann_set_activation_steepness, fann_get_activation_function

This function appears in FANN >= 2.0.0.