PHP マニュアル: Sets the activation function for supplied neuron and layer

説明

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.

パラメータ

ann: ニューラルネットワークリソース。
activation_function: The activation functions constant.
layer: Layer number.
neuron: Neuron number.

戻り値

成功した場合に true、それ以外の場合に false を返します。

参考

fann_set_activation_function_layer
fann_set_activation_function_hidden
fann_set_activation_function_output
fann_set_activation_steepness
fann_get_activation_function