soilhypfit (version 0.1-8)

utility-functions: Utility functions for package soilhypfit

Description

This page documents the functions convergence_message, extract_error_messages, select_failed_fits and check_param_boundf.

Usage

convergence_message(x, sce = FALSE)
extract_error_messages(object, start = 1, stop = 80, prt = TRUE)
select_failed_fits(object)
check_param_boundf(y, compare_thetar_thetas = TRUE)

Value

The function convergence_message and extract_error_messages

return invisibly the convergence code or the error messages.

Arguments

x

an integer scalar issued by the optimisers of nloptr or SCEoptim on
(non-)convergence

sce

a logical scalar to select the optimiser nloptr (FALSE, default) or SCEoptim (TRUE).

object

an object of class fit_wrc_hcc, see fit_wrc_hcc.

prt

a logical scalar controlling whether the error messages should be printed.

start, stop

integer scalar with the first and last character to print.

y

a named list of numeric vectors of length 2 that define the allowed lower and upper bounds (box constraints) for the parameters of the models, see argument param_bound of control_fit_wrc_hcc.

compare_thetar_thetas

logical scalar to control cross-comparison of valid ranges of parameters thetar and thetas.

Author

Andreas Papritz .

Details

The function convergence_message prints a message that explains the convergence codes, for nloptr, see NLopt return values. The function extract_error_messages extract the error messages of estimations that failed and optionally prints sub-strings of them.
The function select_failed_fits returns the ids of the soil samples for which parameter estimation failed. The function check_param_boundf checks the validity and consistecy of bounds of box constraints of model parameters.

References

Duan, Q., Sorooshian, S., and Gupta, V. K. (1994) Optimal use of the SCE-UA global optimisation method for calibrating watershed models, Journal of Hydrology 158, 265--284, tools:::Rd_expr_doi("10.1016/0022-1694(94)90057-4").

Johnson, S.G. The NLopt nonlinear-optimisation package. https://github.com/stevengj/nlopt.

See Also

soilhypfitIntro for a description of the models and a brief summary of the parameter estimation approach;

fit_wrc_hcc for (constrained) estimation of parameters of models for soil water retention and hydraulic conductivity data;

control_fit_wrc_hcc for options to control fit_wrc_hcc;

soilhypfitmethods for common S3 methods for class fit_wrc_hcc;

vcov for computing (co-)variances of the estimated nonlinear parameters;

prfloglik_sample for profile loglikelihood computations;

wc_model and hc_model for currently implemented models for soil water retention curves and hydraulic conductivity functions;

evaporative-length for physically constraining parameter estimates of soil hydraulic material functions.

Examples

convergence_message(3)
convergence_message(2, sce = TRUE)