fann_set_activation_function

(PECL fann >= 1.0.0)

fann_set_activation_function — Sets the activation function for supplied neuron and layer

설명

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.

인수

ann: Neural network resource.
activation_function: The activation functions constant.
layer: Layer number.
neuron: Neuron number.

반환값

Returns TRUE on success, or FALSE otherwise.

참고

fann_set_activation_function_layer() - Sets the activation function for all the neurons in the supplied layer.
fann_set_activation_function_hidden() - Sets the activation function for all of the hidden layers
fann_set_activation_function_output() - Sets the activation function for the output layer
fann_set_activation_steepness() - Sets the activation steepness for supplied neuron and layer number
fann_get_activation_function() - Returns the activation function