dmgf_fit_one_curve: Fit one growth curve

In dendRoAnalyst: A Tool for Processing and Analyzing Dendrometer Data

Fit one growth curve

Description

Internal helper used by [dm.growth.fit()] to fit one curve for one series and one season, or one pooled curve.

Usage

dmgf_fit_one_curve(
  x_obs,
  y_obs,
  x_pred,
  season_start_date = as.Date(NA),
  season_length = NA_real_,
  season_id = NULL,
  method,
  loess_span,
  spline_df,
  growth_fraction,
  min_unique_growth,
  rate_threshold_fraction = 0.1,
  fix_a_to_observed_max = FALSE,
  fixed_a_multiplier = 1,
  start_value_gompertz_parameters,
  start_value_richards_parameters
)

Arguments

x_obs	Observed x values.
y_obs	Observed growth values.
x_pred	Prediction x values.
season_start_date	Season start date.
season_length	Season length.
season_id	Optional season ID for pooled fits.
method	Fitting method.
loess_span	Loess span.
spline_df	Spline degrees of freedom.
growth_fraction	Growth fractions used for cumulative timing.
min_unique_growth	Minimum number of unique growth values.
rate_threshold_fraction	Fraction of peak rate used for rate timing.
fix_a_to_observed_max	Logical.
fixed_a_multiplier	Multiplier for fixed asymptote.
start_value_gompertz_parameters	Starting values for Gompertz.
start_value_richards_parameters	Starting values for logistic/Richards.

Value

List with fitted predictions and parameters.

dendRoAnalyst documentation built on May 20, 2026, 5:07 p.m.