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fann_set_activation_function_hidden	fann_set_activation_function_output

Fann Functions	Last updated: Mon, 26 Oct 2026

fann_set_activation_function_layer

(PECL fann >= 1.0.0)

fann_set_activation_function_layer — Sets the activation function for all the neurons in the supplied layer

Description

function fann_set_activation_function_layer(resource $ann, int $activation_function, int $layer): bool

Set the activation function for all the neurons in the 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.

Parameters

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

Return Values

Returns true on success, or false otherwise.

See Also

fann_set_activation_function() - Sets the activation function for supplied neuron and 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_set_activation_function_hidden	fann_set_activation_function_output

Fann Functions	Last updated: Mon, 26 Oct 2026