(PECL fann >= 1.0.0)
fann_set_activation_steepness_output — Sets the steepness of the activation steepness in the output layer
$ann
   , float $activation_steepness
   )Sets the steepness of the activation steepness in the output layer.
ann
    Neural network resource.
activation_steepness
    The activation steepness.
Returns TRUE on success, or FALSE otherwise.