is this possible?

Hi,

   I created a custom kernel for isis that has parameters.  I would
like to find the best set of parameters that minimize the difference
between two flux-corrected spectra.  To make this more clear, suppose
the data set ids are 1 and 2.  The function that I would like to
minimize is

    define my_chisqr ()
    {
        flux_corr (1);
        flux_corr (2);
        f1 = get_data_flux(1);
        f2 = get_data_flux(2);
	
	return sum ((f1.value-f2.value)^2);
    }

Note that since the kernel has parameters, the value returned by the
get_data_flux function will depend upon those parameters.

What is the best way to accomplish this in isis?

Also, if that wasn't enough, I have a feature request: allow an array
as the first parameter of set_par, e.g.,

    set_par ([1:3], 0.5);

would set parameters 1,2, and 3 to 0.5.

Thanks,
--John
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