Synopsis
Thaw model parameters so they vary during a fit
Syntax
thaw([parameter])
Description
The thaw command thaws the specified model parameters so that they may vary during a fit.
- parameter(s) - parameters to thaw
One of more model parameters may be specified as a comma-separated list. If the model name is provided without a parameter specified, all of the parameters in the model are thawed.
To fix a parameter at the current value during a fit, use the freeze command ("ahelp freeze").
Examples
Example 1
sherpa> thaw(pl.ampl)
Thaw the amplitude parameter of a powerlaw1d model named "pl".
Example 2
sherpa> set_source(xswabs.gal*xsmekal.mek) sherpa> thaw(mek.kT)
Create a source model and thaw the plasma temperature parameter (kt) of the xsmekal model.
Example 3
sherpa> thaw(poly.c1, poly.c2)
Thaw the second and third (c1, c2) coefficients of a polynomial model.
Example 4
sherpa> thaw(poly)
Thaw all of the components of the polynomial model.
Bugs
See the bugs pages on the Sherpa website for an up-to-date listing of known bugs.