(PECL fann >= 1.0.0)
fann_get_activation_steepness — Returns the activation steepness for supplied neuron and layer number
Get the activation steepness for neuron number neuron
in layer number
layer
, counting the input layer as layer 0.
It is not possible to get activation steepness for the neurons in the input layer.
The steepness of an activation function says something about how fast the activation function goes from the minimum to the maximum. A high value for the activation function will also give a more aggressive training.
When training neural networks where the output values should be at the extremes (usually 0 and 1, depending on the activation function), a steep activation function can be used (e.g. 1.0).
The default activation steepness is 0.5.
ann
Neural network resource.
layer
Layer number
neuron
Neuron number
The activation steepness for the neuron or -1 if the neuron is not defined in the neural network, or false
on error.