Re: storing statistic results

Hi Juan,

    juan> I wonder if it is possible to store the results of a fit in
    juan> a variable. I would like to save the number of free
    juan> parameters, \chi^2, \chi^2_\nu in a file for easy access.


I think what you want are the optional arguments to fit_counts:


  fit_counts

   SYNOPSIS
      search for best fit parameters

   USAGE
      s = fit_counts ([response_type][,&info_struct])

   DESCRIPTION
      By default, this function fits the current model to the counts
      data by folding the model through the instrument response. If
      no instrument response has been assigned, an ideal instrument
      is assumed.  If no errors occurred during the fit, the return
      status is zero, otherwise the return value is -1.

      The two optional arguments may appear in any order.

      The optional Struct_Type argument should provide the address of
      a structure:

       variable info_struct = struct {statistic, num_variable_params, num_bins}

      On return, the struct fields contain the value of the chi^2
      fit-statistic ( statistic), the number of variable fit
      parameters ( num_variable_params) and the number of data bins (
      num_bins).


...


If you want to put them into a file, you can use writecol().




-- Dave

David Huenemoerder  617-253-4283 (o); -253-8084 (f); http://space.mit.edu/home/dph
MIT Kavli Institute for Astrophysics and Space Research
70 Vassar St., NE80-6065,
Cambridge, MA  02139
[Admin. Asst.: Elaine Tirrell, 617-253-7480, egt_at_email.domain.hidden
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