get_init_pars_logistic {miLAG}

get_init_pars_logistic

Description

Finds reasonable approximation for logistic growth curve parameters (K, lag. growth rate) based on the growth curve and some initial values These approximations will be used as the initial values for the proper optimization algorithm run later.

Usage

get_init_pars_logistic(
  data_this_curve,
  this_n0,
  init_K,
  init_lag,
  init_gr_rate,
  min_b = 0.2,
  min_a = 0.8
)

Arguments

data_this_curve

data from one specific growth curve with these two columns: time and biomass

this_n0

the initial biomass

init_K

initial value for the saturation parameter K

init_lag

initial value for the lag parameter

init_gr_rate

initial value for the growth rate

min_b

defaults to 0.2; mina and minb define where to look for exponential phase: it will be where the biomass is between min + (max-min)*(min_a TO min_b)

min_a

defaults to 0.8

Value

list of parameters: init_K, init_lag, init_gr_rate,