Module descent::expr::dynam

Dynamically constructed expressions.

These expressions offer the greatest flexibility in how they can be constructed at runtime. Forward and reverse automatic differentiation techniques have been implemented for calculating expression first and second derivatives. They are however much slower than the more direct fixed expression types (in fixed module) which allow for greater compiler optimisation of the derivative calculations.

Examples

See Expr for more details.

use descent::expr::{Var, Par};
use descent::expr::dynam::NumOps; // required to bring in powi usage
let x = Var(0);
let y = Var(1);
let p = Par(0);

let e = p * x - (5.0 * y.powi(2) + 4.0);

Structs

Expr	An expression that can be dynamically constructed.
ExprDyn	Snapshot of a dynamically constructed expression Expr.
ExprInfo	Sparsity and other information about an Expr for guiding AD process.
WorkSpace	Workspace used for performing expression AD.

Traits

NumOps

Trait for using numeric operators such as .powi(i32), .cos(), .sin() in dynamic expressions.

Type Definitions

ExprDynSum

Represents the sum of multiple dynamic expressions.