Struct ReverseVariable 

pub struct ReverseVariable {
    pub index: usize,
    pub value: f64,
    pub grad: f64,
}

Variable in the computational graph for reverse-mode AD

Fields

index: usize

Variable index in the tape

value: f64

Current value

grad: f64

Accumulated gradient (adjoint)

Implementations

impl ReverseVariable

pub fn new(index: usize, value: f64) -> Self

Create a new variable

pub fn constant(value: f64) -> Self

Create a constant variable (not in tape)

pub fn is_constant(&self) -> bool

Check if this is a constant

pub fn value(&self) -> f64

Get the value

pub fn grad(&self) -> f64

Get the gradient

pub fn set_grad(&mut self, grad: f64)

Set the gradient (used internally by backpropagation)

pub fn add_grad(&mut self, grad: f64)

Add to the gradient (used internally by backpropagation)

pub fn zero_grad(&mut self)

Reset gradient to zero

pub fn from_scalar(value: f64) -> Self

Create a variable from a scalar (convenience method)

pub fn powi(&self, n: i32) -> Self

Power operation (simple version without graph context)

pub fn exp(&self) -> Self

Exponential operation (simple version without graph context)

pub fn ln(&self) -> Self

Natural logarithm operation (simple version without graph context)

pub fn sin(&self) -> Self

Sine operation (simple version without graph context)

pub fn cos(&self) -> Self

Cosine operation (simple version without graph context)

pub fn tan(&self) -> Self

Tangent operation (simple version without graph context)

pub fn sqrt(&self) -> Self

Square root operation (simple version without graph context)

pub fn abs(&self) -> Self

Absolute value operation (simple version without graph context)

Trait Implementations

impl Add<ReverseVariable> for f64

type Output = ReverseVariable

The resulting type after applying the + operator.

fn add(self, var: ReverseVariable) -> ReverseVariable

Performs the + operation.

impl Add<f64> for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the + operator.

fn add(self, scalar: f64) -> Self

Performs the + operation.

impl Add for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the + operator.

fn add(self, other: Self) -> Self

Performs the + operation.

impl Clone for ReverseVariable

fn clone(&self) -> ReverseVariable

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ReverseVariable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Div<ReverseVariable> for f64

type Output = ReverseVariable

The resulting type after applying the / operator.

fn div(self, var: ReverseVariable) -> ReverseVariable

Performs the / operation.

impl Div<f64> for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the / operator.

fn div(self, scalar: f64) -> Self

Performs the / operation.

impl Div for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the / operator.

fn div(self, other: Self) -> Self

Performs the / operation.

impl Mul<ReverseVariable> for f64

type Output = ReverseVariable

The resulting type after applying the * operator.

fn mul(self, var: ReverseVariable) -> ReverseVariable

Performs the * operation.

impl Mul<f64> for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the * operator.

fn mul(self, scalar: f64) -> Self

Performs the * operation.

impl Mul for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the * operator.

fn mul(self, other: Self) -> Self

Performs the * operation.

impl Neg for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Sub<ReverseVariable> for f64

type Output = ReverseVariable

The resulting type after applying the - operator.

fn sub(self, var: ReverseVariable) -> ReverseVariable

Performs the - operation.

impl Sub<f64> for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the - operator.

fn sub(self, scalar: f64) -> Self

Performs the - operation.

impl Sub for ReverseVariable

type Output = ReverseVariable

The resulting type after applying the - operator.

fn sub(self, other: Self) -> Self

Performs the - operation.