Fann Funktionen
PHP-Handbuch

fann_set_activation_function

Sets the activation function for supplied neuron and layer

Beschreibung

bool fann_set_activation_function ( resource $ann , int $activation_function , int $layer , int $neuron )

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 unbound.

The supplied activation_function value must be one of the activation functions constants.

The return value is one of the activation functions constants.

Parameter-Liste

ann

Resource eines neuralen Netzwerks.

activation_function

The activation functions constant.

layer

Layer number.

neuron

Neuron number.

Rückgabewerte

Gibt TRUE bei Erfolg, sonst FALSE zurück.

Siehe auch

  • fann_set_activation_function_layer
  • fann_set_activation_function_hidden
  • fann_set_activation_function_output
  • fann_set_activation_steepness
  • fann_get_activation_function