next_beta: Find the next beta according to: ¤ approximation_ratio(alpha,...
In edahelsinki/slise: Sparse Linear Subset Explanations

next_beta

R Documentation

Find the next beta according to: ¤ approximation_ratio(alpha, beta_old, beta_new) == max_approx ¤ beta_new >= beta_old + min_increase ¤ beta_new <= beta_max

Description

Find the next beta according to: ¤ approximation_ratio(alpha, beta_old, beta_new) == max_approx ¤ beta_new >= beta_old + min_increase ¤ beta_new <= beta_max

Usage

next_beta(
  residuals2,
  epsilon2,
  beta = 0,
  weight = NULL,
  beta_max = 20/epsilon2,
  log_max_approx = log(1.15),
  beta_min_increase = (beta_max + beta) * 5e-04
)

Arguments

`residuals2`	squared residuals
`epsilon2`	squared error tolerance
`beta`	current sigmoid steepness
`weight`	weight vector (default: NULL)
`beta_max`	max sigmoid steepnsess
`log_max_approx`	logarithm of the approximation ratio target for increasing beta
`beta_min_increase`	minimum beta step