** Next:** writefits
**Up:** Tcl Scripts
** Previous:** rescalecov

##

simftest

**estimate the F-test probability for adding a component**
Tcl script to generate simulated datasets and use these to estimate
the F-test probability for adding a model component.

**Syntax:** |
**simftest** |
`<model_comp><niter>[<filename>]` |

This script runs `<niter>` sets of simulated datasets to estimate the F-test
probability for adding the additional model component number `<model_comp>`.
If `<filename>` is specified then passes this to `lrt.tcl` to
save likelihood ratio simulation information. The first line of the file
written contains the results for the data, the other lines for the
simulations. Each line comprises the statistic value for the model without
`<model_comp>`, that for the model with `<model_comp>`, and the
difference.

Before running this script the model should be set up including the additional
component to be tested. The script will create temporary files
`model_with_comp.xcm` and `model_without_comp.xcm`.