Struct diffsol::ode_solver::diffsl::DiffSlContext

pub struct DiffSlContext { /* private fields */ }

Context for the ODE equations specified using the DiffSL language. This contains the compiled code and the data structures needed to evaluate the ODE equations.

Example

use diffsol::{OdeBuilder, Bdf, OdeSolverState, OdeSolverMethod, DiffSlContext};
type M = nalgebra::DMatrix<f64>;
         
// dy/dt = -ay
// y(0) = 1
let context = DiffSlContext::new("
    in = [a]
    a { 1 }
    u { 1.0 }
    F { -a*u }
    out { u }
").unwrap();
let problem = OdeBuilder::new()
 .rtol(1e-6)
 .p([0.1])
 .build_diffsl(&context).unwrap();
let mut solver = Bdf::default();
let t = 0.4;
let state = OdeSolverState::new(&problem, &solver).unwrap();
solver.set_problem(state, &problem);
while solver.state().unwrap().t <= t {
   solver.step().unwrap();
}
let y = solver.interpolate(t);

Implementations

impl DiffSlContext

pub fn new(text: &str) -> Result<Self>

Create a new context for the ODE equations specified using the DiffSL language. The input parameters are not initialized and must be set using the OdeEquations::set_params function before solving the ODE.

pub fn out(&self, t: T, y: &V) -> &[T]