Struct rusty_machine::learning::toolkit::link_fn::Sigmoid [−] [src]

pub struct Sigmoid;

Sigmoid link function.

Trait Implementations

impl LinkFunc for Sigmoid
[src]

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