dmgfd_fit_one_curve: Fit one double growth curve

In dendRoAnalyst: A Tool for Processing and Analyzing Dendrometer Data

Fit one double growth curve

Description

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

Usage

dmgfd_fit_one_curve(
  x_obs,
  y_obs,
  x_pred,
  season_start_date = as.Date(NA),
  season_length = NA_real_,
  method,
  growth_fraction,
  min_unique_growth,
  rate_threshold_fraction = 0.1,
  peak_separation_min = 10,
  valley_ratio_max = 0.4,
  min_relative_peak = 0.05,
  fallback_to_single = TRUE,
  fix_a_to_observed_max = FALSE,
  fixed_a_multiplier = 1,
  start_value_double_gompertz_parameters,
  start_value_double_richards_parameters
)

Arguments

x_obs	Observed season-day values.
y_obs	Observed cumulative growth values.
x_pred	Prediction season-day values.
season_start_date	Season start date.
season_length	Season length.
method	Double-growth method.
growth_fraction	Growth fractions used for cumulative timing.
min_unique_growth	Minimum number of unique growth values.
rate_threshold_fraction	Fraction of peak rate.
peak_separation_min	Minimum separation between peaks.
valley_ratio_max	Maximum allowed valley-to-peak ratio.
min_relative_peak	Minimum relative derivative peak height.
fallback_to_single	Logical fallback flag.
fix_a_to_observed_max	Logical fixed-asymptote flag.
fixed_a_multiplier	Multiplier for fixed asymptote.
start_value_double_gompertz_parameters	Double-Gompertz starts.
start_value_double_richards_parameters	Double-Richards starts.

Value

List with fitted predictions and parameters.

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