andes.routines.qndf

QNDF: Variable-order quasi-constant-step NDF method (Shampine & Reichelt 1997).

Functions

compute_R(k, rho, R)
compute_U(k, U)
compute_beta0(k)
compute_predictor(cache, k)
error_constant(k)
rescale_D(cache, rho, k)
select_order_and_step(cache, h, order, err_est)	Pick optimal (order, step_size) from order-1, order, order+1.
update_D(D, dx_corr, k)

Classes

QNDF()	Variable-order (1-5) quasi-constant-step NDF method.
QNDFCache(n, abstol, reltol[, max_order])	Pre-allocated workspace.