| add_predictions | Add predictions to a data frame | 
| add_predictors | Add predictors to a formula | 
| add_residuals | Add residuals to a data frame | 
| bootstrap | Generate 'n' bootstrap replicates. | 
| crossv_kfold | Generate test-training pairs for cross-validation | 
| crossv_loo | Generate test-training pairs for cross-validation | 
| crossv_mc | Generate test-training pairs for cross-validation | 
| data_grid | Generate a data grid. | 
| fit_with | Fit a list of formulas | 
| formulae | Create a list of formulas | 
| formulas | Create a list of formulas | 
| gather_predictions | Add predictions to a data frame | 
| gather_residuals | Add residuals to a data frame | 
| geom_ref_line | Add a reference line (ggplot2). | 
| heights | Height and income data. | 
| mae | Compute model quality for a given dataset | 
| mape | Compute model quality for a given dataset | 
| model-quality | Compute model quality for a given dataset | 
| model_matrix | Construct a design matrix | 
| mse | Compute model quality for a given dataset | 
| na.warn | Handle missing values with a warning | 
| permute | Generate 'n' permutation replicates. | 
| permute_ | Generate 'n' permutation replicates. | 
| qae | Compute model quality for a given dataset | 
| resample | A "lazy" resample. | 
| resample_bootstrap | Generate a boostrap replicate | 
| resample_partition | Generate an exclusive partitioning of a data frame | 
| resample_permutation | Create a resampled permutation of a data frame | 
| rmse | Compute model quality for a given dataset | 
| rsae | Compute model quality for a given dataset | 
| rsquare | Compute model quality for a given dataset | 
| seq_range | Generate a sequence over the range of a vector | 
| sim | Simple simulated datasets | 
| sim1 | Simple simulated datasets | 
| sim2 | Simple simulated datasets | 
| sim3 | Simple simulated datasets | 
| sim4 | Simple simulated datasets | 
| spread_predictions | Add predictions to a data frame | 
| spread_residuals | Add residuals to a data frame | 
| typical | Find the typical value |