| boot632 | The .632 bootstrap estimation of the MSE | 
| boot632multiple | Repeated .632 bootstrapa | 
| bootOob | The oob bootstrap (smooths leave-one-out CV) | 
| Brassica | Gene expression and phenotypes of Brassica napus (rapeseed) plants | 
| buildConfInt | Calculate a confidence interval for R², MSE and MST | 
| checkFitFun | Check whether supplied prediction function meets the requirements | 
| estCorMSEMST | Estimate correlation between MSE and MST estimators | 
| estMSE | Estimate MSE and its standard error | 
| formatSeconds | Format seconds into human readable format | 
| getSEsNested | Calculate standard error on MSE from nested CV results | 
| isPD | Helper function to check if matrix is positive definite | 
| processOob | Process the out-of-bag bootstraps to get to standard errors following Efron 1997 | 
| R2oosse | Estimate out-of-sample R² and its standard error | 
| RsquaredSE | Calculate out-of-sample R² and its standard error based on MSE estimates | 
| simpleCV | Perform simple CV, and return the MSE estimate |