rp_gaussian: Gaussian random projection matrix

In spareg: Sparse Projected Averaged Regression

Gaussian random projection matrix

Description

Creates an object class 'randomprojection' using arguments passed by user which in turn can be employed to generate a random matrix with normally distributed entries (mean 0 and standard deviation 1 by default).

Usage

rp_gaussian(..., control = list())

Arguments

...	includes arguments which can be passed as attributes to the random projection matrix
control	list of arguments to be used in functions generate_fun, update_fun, update_rpm_w_data

Details

Arguments related to the random projection procedure can be passed to the rp_gaussian() function through ..., and will be saved as attributes of the 'randomprojection' object. The following attributes are relevant for spar and spar.cv:

• mslow: integer giving the minimum dimension to which the predictors should be projected; defaults to \log(p).

• msup: integer giving the maximum dimension to which the predictors should be projected; defaults to n/2.

Value

object of class 'randomprojection' which is a list with elements name, generate_fun, update_fun, control

Examples

example_data <- simulate_spareg_data(n = 200, p = 2000, ntest = 100)
spar_res <- spar(example_data$x, example_data$y, xval = example_data$xtest,
  yval = example_data$ytest, nummods=c(5, 10, 15, 20, 25, 30),
  rp = rp_gaussian(control = list(sd = 1/sqrt(ncol(example_data$x)))))

spareg documentation built on Aug. 8, 2025, 6:46 p.m.