prof_alpha: Profiling tuning parameters

In tramnet: Penalized Transformation Models

Profiling tuning parameters

Description

Computes the regularization path of all coefficients for a single tuning, alpha, parameter over a sequence of values.

Usage

prof_alpha(model, min_alpha = 0, max_alpha = 1, nprof = 5, as.lm = FALSE)

Arguments

model	Object of class "tramnet".
min_alpha	Minimal value of alpha (default min_alpha = 0).
max_alpha	Maximal value of alpha (default max_alpha = 1).
nprof	Number of profiling steps (default nprof = 5).
as.lm	Return scaled coefficients for class "tramnet_Lm".

Value

Object of class "prof_alpha" which contains the regularization path of all coefficients and the log-likelihood over the mixing parameter alpha

Examples

if (require("survival") & require("penalized")) {
  data("nki70", package = "penalized")
  nki70$resp <- with(nki70, Surv(time, event))
  x <- scale(model.matrix( ~ 0 + DIAPH3 + NUSAP1 + TSPYL5 + C20orf46, data = nki70))
  y <- Coxph(resp ~ 1, data = nki70, order = 10, log_first = TRUE)
  fit <- tramnet(y, x, lambda = 1, alpha = 1)
  pfa <- prof_alpha(fit)
  plot_path(pfa)
}

tramnet documentation built on Nov. 4, 2023, 3 p.m.