fdm2id (version 0.9.6)

LINREG: Linear Regression

Description

This function builds a linear regression model. Standard least square method, variable selection, factorial methods are available.

Usage

LINREG(
  x,
  y,
  formula = ".",
  reg = c("linear", "subset", "ridge", "lasso", "elastic", "pcr", "plsr"),
  regeval = c("r2", "bic", "adjr2", "cp", "msep"),
  scale = TRUE,
  lambda = 10^seq(-5, 5, length.out = 101),
  alpha = 0.5,
  graph = TRUE,
  tune = FALSE,
  ...
)

Value

The classification model, as an object of class model-class.

Arguments

x

Predictor matrix.

y

Response vector.

formula

A symbolic description of the model to be fitted (as a character string).

reg

The algorithm.

regeval

The evaluation criterion for subset selection.

scale

If true, PCR and PLS use scaled dataset.

lambda

The lambda parameter of Ridge, Lasso and Elastic net regression.

alpha

The elasticnet mixing parameter.

graph

A logical indicating whether or not graphics should be plotted (ridge, LASSO and elastic net).

tune

If true, the function returns paramters instead of a classification model.

...

Other parameters.

See Also

lm, regsubsets, mvr, glmnet

Examples

if (FALSE) {
require (datasets)
# With one independant variable
data (cars)
LINREG (cars [, -2], cars [, 2])
# With two independant variables
data (trees)
LINREG (trees [, -3], trees [, 3])
# With non numeric variables
data (ToothGrowth)
LINREG (ToothGrowth [, -1], ToothGrowth [, 1], formula = "-1+supp+dose") # Different intersept
LINREG (ToothGrowth [, -1], ToothGrowth [, 1], formula = "dose:supp") # Different slope
LINREG (ToothGrowth [, -1], ToothGrowth [, 1], formula = "-1+supp+dose:supp") # Complete model
# With multiple numeric variables
data (mtcars)
LINREG (mtcars [, -1], mtcars [, 1])
LINREG (mtcars [, -1], mtcars [, 1], reg = "subset", regeval = "adjr2")
LINREG (mtcars [, -1], mtcars [, 1], reg = "ridge")
LINREG (mtcars [, -1], mtcars [, 1], reg = "lasso")
LINREG (mtcars [, -1], mtcars [, 1], reg = "elastic")
LINREG (mtcars [, -1], mtcars [, 1], reg = "pcr")
LINREG (mtcars [, -1], mtcars [, 1], reg = "plsr")
}