Struct rusty_machine::learning::toolkit::activ_fn::Sigmoid

pub struct Sigmoid;

Sigmoid activation function.

Trait Implementations

impl ActivationFunc for Sigmoid

fn func(x: f64) -> f64

Sigmoid function.

Returns 1 / ( 1 + e^-t).

fn func_grad(x: f64) -> f64

Gradient of sigmoid function.

Evaluates to (1 - e^-t) / (1 + e^-t)2

fn func_inv(x: f64) -> f64

The inverse of the activation function.