Generate control specifications for f function

Generate control specifications for f function

control_f(
  improve_hessian = TRUE,
  eps = 1e-04,
  use_same_V = FALSE,
  use_num_dK = TRUE,
  numerical_precond = TRUE
)

Arguments

improve_hessian

improve numerical hessian by using central difference estimation (O(eps^2) error) default is forward difference estimation (O(eps) error)

eps

eps for computing numerical gradient

use_same_V

use the same V for preconditioning in the same chain

use_num_dK

use finite differences for dK (operator Jacobian) even when using analytic gradients elsewhere. Default TRUE.

numerical_precond

use numerical preconditioner (finite-difference Hessian). If FALSE, use analytical preconditioner for theta_K block. Default TRUE.

Value

list of control variables