| crime | U. S. Crimes | 
| get_SVD | Extract the SVD components from a PCA-like object | 
| ggbiplot | Biplot for Principal Components using ggplot2 | 
| ggscreeplot | Screeplot for Principal Components | 
| reflect | Reflect Columns in a Principal Component-like Object | 
| wine | Wine dataset | 
| wine.class | Wine dataset |