model_data

           Use separate data in distinct group as fit model.

           CAFE

           fitmodel

           x         - Input x value array. Should be double precision.
           parameter - Parameter to compute model. Must contain 1
                       value.

           data:grp - group using to get data. !! THIS
                      PARAMETER MUST BE FIXED AND INTEGER !!!
                      (Otherwise the fit algorithm tries to
                      vary the group - would be quite interesting...)
                      It is prudent not to define a model for
                      the group which contains these data.

           y = data[x].
           To allow arbitrary x-values interpolation will be
           used. For x values out of the data range the closest data
           x value will be used.

           None

           $Id: cafe_model_data.pro,v 1.8 2003/11/04 14:27:36 goehler Exp $

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