fix_multstartpars: Check and fix multstart parameters

In mathesong/kinfitr: Kinetic Modelling of PET Time Activity Curves

Check and fix multstart parameters

Description

Checks and fixes for inputted multstart parameters. Checks missing multstart boundaries, checks if some parameters aren't to be tried with different starting parameters, and checks the lengths of the multstart bounds

Usage

fix_multstartpars(
  start,
  lower,
  upper,
  multstart_iter,
  multstart_lower,
  multstart_upper
)

Arguments

start	Original starting values for without multstart
lower	Lower fitting bounds
upper	Upper fitting bounds
multstart_iter	Iterations
multstart_lower	Lower starting bounds
multstart_upper	Upper starting bounds

Value

A list containing the parameters

Author(s)

Granville J Matheson, [e-mail]

Examples

start <- list(a = 1, b = 2, c = 3)
upper <- lapply(start, function(x) x + 1)
lower <- lapply(start, function(x) x - 1)
multstart_iter <- 5

multstart_lower <- NULL
multstart_upper <- NULL

fix_multstartpars(start, lower, upper, multstart_iter, multstart_lower, multstart_upper)

mathesong/kinfitr documentation built on Jan. 15, 2024, 11:07 p.m.