subsets: Get the found variable subset(s)

In gaselect: Genetic Algorithm (GA) for Variable Selection from High-Dimensional Data

Get the found variable subset(s)

Description

Get a list of variable indices/names of the found variable subsets.

Usage

subsets(object, indices, names = TRUE)

Arguments

object	The GenAlg object returned by genAlg.
indices	The indices of the subsets or empty if all subsets should be returned.
names	Should the names or the column numbers of the variables be returned.

Details

This method is used to get the names or indices of the variables used in specified variable subsets.

Value

A logical matrix where each column represents a variable subset

Examples

ctrl <- genAlgControl(populationSize = 200, numGenerations = 15, minVariables = 5,
    maxVariables = 12, verbosity = 1)

evaluator <- evaluatorPLS(numReplications = 2, innerSegments = 7, testSetSize = 0.4,
    numThreads = 1)

# Generate demo-data
set.seed(12345)
X <- matrix(rnorm(10000, sd = 1:5), ncol = 50, byrow = TRUE)
y <- drop(-1.2 + rowSums(X[, seq(1, 43, length = 8)]) + rnorm(nrow(X), 1.5));

result <- genAlg(y, X, control = ctrl, evaluator = evaluator, seed = 123)

subsets(result, names = TRUE, indices = 1:5) # best 5 variable subsets as a list of names
result@subsets[ , 1:5] # best 5 variable subsets as a logical matrix with the subsets in the columns

gaselect documentation built on Feb. 16, 2023, 6:14 p.m.