Fit symmetric epsilon-SVR with MAPE loss (Model 2) — internal

Internal fitter for the symmetric MAPE epsilon-SVR family. Use psvr() with loss = "mape" and sym = +1L / -1L instead. Returns the legacy psvr_mape_sym shape; the deprecation wrapper mape_sym_svr() forwards directly to this function. The kernel must satisfy Assumption 3 of the paper; see make_kernel().

Usage

.fit_mape_sym(
  X,
  y,
  kernel,
  C,
  eps,
  a = 1,
  solver = c("smo", "osqp"),
  tol = 1e-05
)

Arguments

X, y, kernel, C, eps, a, solver, tol

See mape_sym_svr().

Value

A list of class "psvr_mape_sym" (legacy shape).