Freeze model parameters, so they do not vary during a fit.
freeze([parameter], [[parameters]]);
Given one or more model parameters, freeze each model parameter
at its current value. The frozen parameters are not varied
during a fit. (If an argument is a model, then all the model
parameters of that model are frozen.)
-
parameter(s) - model parameters to freeze for the fit
The freeze function must be given at least one argument.
That argument must be a model or a model parameter. The
function can be given an indefinite number of models and/or model
parameters as arguments. If a model is an argument, all the
parameters of that model are frozen at their current values.
To unfreeze model parameter values
and allow them to vary, the command thaw ("ahelp
thaw") is used.
The model parameter "ampl" of model "g" is frozen at
its current value.
sherpa> freeze(g.ampl, g.fwhm);
Both model parameters "ampl" and "fwhm" of model "g"
are frozen at their current values.
All model parameters specified in model "g" are frozen
at their current values.
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