Assume that there are five data sets currently read in, all of them ungrouped initially.
| XSPEC> setplot group 1-4 | | The first four data sets are treated as one group, with the fifth data sets on its own. Thus all plots will appear to have two data sets. |
| XSPEC> setplot group 1 2 3 4 | | The data sets are reset to each be in their own group. |
| XSPEC> setplot group 2-3 4-5 | | Now there are three plot groups, being data set 1, by itself, and data sets 2-3 and 4-5 as groups. |
XSPEC> setplot group 1-  | | All the data sets are placed in a single plot group. |