add_base.mcgf: Add base model outputted from `fit_base()` to an `mcgf` object.

Description

Add base model outputted from fit_base() to an mcgf object.

Usage

# S3 method for mcgf
add_base(x, fit_base, fit_s, fit_t, sep = FALSE, old = FALSE, ...)
base(x) <- value

Value

x with newly added attributes of the base model.

Arguments

x: An mcgf object.
fit_base: Output from the fit_base() function.
fit_s: Pure spatial model outputted from the fit_base() function. Used only when sep = TRUE.
fit_t: Pure temporal model outputted from the fit_base() function. Used only when sep = TRUE.
sep: Logical; TRUE if spatial and temporal models are fitted separately.
old: Logical; TRUE if the old base model needs to be kept.
...: Additional arguments. Not in use.
value: A list containing the base model as well as its parameters. It must contains the same output as add_base.mcgf() or add_base.mcgf_rs().

Details

After fitting the base model by fit_base(), the results can be added to x by add_base(). To supply the base model directly, use base<- to add the base model; the value must contain model, par_base, cor_base, lag, and horizon.

Examples

Run this code

data(sim1)
sim1_mcgf <- mcgf(sim1$data, dists = sim1$dists)
sim1_mcgf <- add_acfs(sim1_mcgf, lag_max = 5)
sim1_mcgf <- add_ccfs(sim1_mcgf, lag_max = 5)

# Fit a pure spatial model
fit_spatial <- fit_base(
    sim1_mcgf,
    model = "spatial",
    lag = 5,
    par_init = c(c = 0.001, gamma = 0.5),
    par_fixed = c(nugget = 0)
)
# Fit a pure temporal model
fit_temporal <- fit_base(
    sim1_mcgf,
    model = "temporal",
    lag = 5,
    par_init = c(a = 0.3, alpha = 0.5)
)

# Store the fitted models to 'sim1_mcgf'
sim1_mcgf <-
    add_base(sim1_mcgf,
        fit_s = fit_spatial,
        fit_t = fit_temporal,
        sep = TRUE
    )

# Fit a separable model
fit_sep <- fit_base(
    sim1_mcgf,
    model = "sep",
    lag = 5,
    par_init = c(
        c = 0.001,
        gamma = 0.5,
        a = 0.3,
        alpha = 0.5
    ),
    par_fixed = c(nugget = 0)
)
# Store the newly fitted model, and keep the old fit
sim1_mcgf <- add_base(sim1_mcgf, fit_base = fit_sep, old = TRUE)
model(sim1_mcgf, model = "base", old = TRUE)