stics_eval_opti: Objective function to optimize

In VEZY/sticRs: A Package to Set, Manage and Analyze STICS Simulations https://vezy.github.io/sticRs/

Objective function to optimize

Description

Function evaluated for parameter optimization. This function is only provided for informative value, but should not be used by the user. It is called by optimi_stics().

Usage

stics_eval_opti(
  x,
  USM_path,
  obs_name,
  param,
  weight = NULL,
  Plant,
  type = NULL
)

Arguments

x	The starting parameter values
USM_path	The path to the USM
obs_name	The observation file name
param	The parameter names (in same order than x)
weight	The weight used for each variable (see details)
Plant	The plant (i.e. Principal or associated) for which the parameters will be set (only for plant or technical parameters in mixed crop simulations) Set to NULL if using STICS in sole crop
type	The type of the parameter (only used if integers are required)

Details

If weight is not provided by the user, the selection criteria is computed using the equation 5 from Wallach et al. (2011). If they are provided, the equation 6 is used instead.

Value

The weighted product of squares (selection criteria)

References

Wallach, D., Buis, S., Lecharpentier, P., Bourges, J., Clastre, P., Launay, M., … Justes, E. (2011). A package of parameter e00stimation methods and implementation for the STICS crop-soil model. Environmental Modelling & Software, 26(4), 386–394. doi:10.1016/j.envsoft.2010.09.004

VEZY/sticRs documentation built on Oct. 26, 2023, 7:37 a.m.