Build a validated control list for ucminf()

Returns a named list of control parameters that can be passed directly to ucminf(), ucminf_xptr(), etc.

Usage

ucminf_control(
  trace = 0,
  grtol = 1e-06,
  xtol = 1e-12,
  stepmax = 1,
  maxeval = 500L,
  grad = c("forward", "central"),
  gradstep = c(1e-06, 1e-08),
  invhessian.lt = NULL
)

Arguments

trace

Integer. If > 0, print convergence info. Default 0.

grtol

Gradient tolerance. Default 1e-6.

xtol

Step tolerance. Default 1e-12.

stepmax

Initial trust-region radius. Default 1.

maxeval

Maximum function evaluations. Default 500.

grad

Finite-difference type: "forward" or "central". Default "forward".

gradstep

Length-2 step vector. Default c(1e-6, 1e-8).

invhessian.lt

Packed lower-triangle of initial inverse Hessian. Default NULL.

Value

A list of class "ucminf_control".