Convenience wrapper to fit SSgompertzDummy to a data frame — fit_gompertz_dummy • shewhartr

Convenience wrapper to fit SSgompertzDummy to a data frame

Usage

fit_gompertz_dummy(data, x, y, dummy, start = NULL, ...)

Arguments

data: A data frame with the columns referenced by x, y, dummy.
x, y, dummy: Tidy-eval column references.
start: Optional named list of starting values (Asym, b2, b3, Beta). If NULL, the self-starting initialiser is used.
...: Additional arguments passed to stats::nls().

Value

An object of class nls.

Examples

# \donttest{
set.seed(42)
df <- data.frame(
  x = seq(1, 10, length.out = 50),
  d = rep(c(0, 1), each = 25)
)
df$y <- 100 * exp(-2 * exp(-0.3 * df$x)) + 20 * df$d + rnorm(50, 0, 3)
fit <- fit_gompertz_dummy(df, x = x, y = y, dummy = d)
coef(fit)
#>        Asym          b2          b3        Beta 
#> 103.9420206   1.8648478   0.2661911  19.3328517 
# }