inst/doc/examples/example-perrySelect.R

In aalfons/perry: Resampling-Based Prediction Error Estimation for Regression Models

library("perryExamples")
data("coleman")
set.seed(1234)  # set seed for reproducibility

## set up folds for cross-validation
folds <- cvFolds(nrow(coleman), K = 5, R = 10)

## compare LS, MM and LTS regression

# perform cross-validation for an LS regression model
fitLm <- lm(Y ~ ., data = coleman)
cvLm <- perry(fitLm, splits = folds,
              cost = rtmspe, trim = 0.1)

# perform cross-validation for an MM regression model
fitLmrob <- lmrob(Y ~ ., data = coleman)
cvLmrob <- perry(fitLmrob, splits = folds,
                 cost = rtmspe, trim = 0.1)

# perform cross-validation for an LTS regression model
fitLts <- ltsReg(Y ~ ., data = coleman)
cvLts <- perry(fitLts, splits = folds,
               cost = rtmspe, trim = 0.1)

# compare cross-validation results
perrySelect(LS = cvLm, MM = cvLmrob, LTS = cvLts)