| hydrogeo-package | Groundwater data presentation and interpretation. | 
| Axis-method | Class 'piperplot' | 
| hydrogeo | Groundwater data presentation and interpretation. | 
| initialize-method | Class 'piper' | 
| labelAxes-method | Class 'piper' | 
| piper | Create a new piper object | 
| piper-class | Class 'piper' | 
| piperPaper | Create a new piperplot object | 
| piperplot-class | Class 'piperplot' | 
| plot-method | Class 'piper' | 
| plot-method | Plot the diagram area with two triangles and a diamond | 
| show-method | Class 'piper' | 
| testData | Major ions as a percentage of total major ions - Test Data | 
| toPercent | Major ions as a percentage of total major ions | 
| zaporozec | Major ions for groundwaters reported by Zaporozec |