Assume that the current model has four model parameters.
| XSPEC> error 1-4 | | Estimate the 90% confidence ranges for each parameter. |
| XSPEC> error 9.0 | | Estimate the confidence range for parameters 1-4 with delta fit statistic = 9.0, equivalent to the 3 sigma range. |
| XSPEC> error 2.706 1 3 1. 2 | | Estimate the 90% ranges for parameters 1 and 3, and the 1. sigma range for parameter 2. |
| XSPEC> error 4 | | Estimate the 1. sigma range for parameter 4. |
| XSPEC> error stop 20,,3 | | Estimate the 1-sigma range for parameter 3 after resetting the number of trials to 20. Note that the tolerance field had to be included (or at least skipped over). |