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![[Experimental]](figures/lifecycle-experimental.svg?package=biogrowth&version=1.0.6)
Uses some heuristic rules to generate an initial guess of the model parameters
of secondary growth models that can be used for model fitting with
fit_secondary_growth().
make_guess_secondary(fit_data, sec_model_names)Tibble with the data used for the fit. It must have
one column with the observed growth rate (named mu by default; can be
changed using the "formula" argument) and as many columns
as needed with the environmental factors.
Named character vector defining the secondary model for each environmental factor.
## We can use the example dataset included in the package
data("example_cardinal")
## We assign model equations to factors as usual
sec_model_names <- c(temperature = "Zwietering", pH = "fullRatkowsky")
## We can then calculate the initial guesses
make_guess_secondary(example_cardinal, sec_model_names)
## We can pass these parameters directly to fit_secondary_growth
fit_secondary_growth(example_cardinal,
make_guess_secondary(example_cardinal, sec_model_names),
c(),
sec_model_names)
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