Struct NonlinearSystem 

pub struct NonlinearSystem {
    pub equations: Vec<Expression>,
    pub variables: Vec<Variable>,
}

A system of nonlinear equations F(x) = 0.

Fields

equations: Vec<Expression>

The equations F_i(x) (each should equal 0).

variables: Vec<Variable>

The variables in order.

Implementations

impl NonlinearSystem

pub fn new(equations: Vec<Expression>, variables: Vec<Variable>) -> Self

Create a new nonlinear system.

pub fn from_equations( equations: Vec<Equation>, variables: Vec<Variable>, ) -> Self

Create from Equation types (converts to F(x) = 0 form).

pub fn num_equations(&self) -> usize

Number of equations.

pub fn num_variables(&self) -> usize

Number of variables.

pub fn is_square(&self) -> bool

Check if the system is square (n equations, n variables).

pub fn evaluate( &self, point: &[f64], ) -> Result<Vec<f64>, NonlinearSystemSolverError>

Evaluate all equations at a point.

pub fn jacobian( &self, ) -> Result<Vec<Vec<Expression>>, NonlinearSystemSolverError>

Compute the Jacobian matrix symbolically. Returns J[i][j] = ∂F_i/∂x_j

pub fn evaluate_jacobian( &self, point: &[f64], ) -> Result<Vec<Vec<f64>>, NonlinearSystemSolverError>

Evaluate the Jacobian matrix at a point.

pub fn variable_names(&self) -> Vec<String>

Variable names as strings.

Trait Implementations

impl Clone for NonlinearSystem

fn clone(&self) -> NonlinearSystem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NonlinearSystem

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

Formats the value using the given formatter.