tie

           links parameters to other

           cafe

           tie, <param1>[:group1], [:group2],

           param1 - The parameter(s) which will be tied to another parameter.
                    This can be either:
                        - The absolute parameter number in the
                          current model.
                        - A parameter number range, defined by the
                          first parameter and last parameter,
                          separated with "-". (e.g. 2-5)
                        - A string designating the parameter
                          name. The parameter name is usually
                          "model:parname". If this parameter name is
                          not unique in current model all matching
                          parameters are tied.
                          Using the parameter name "*" matches all
                          parameters.
           group1 - The group of param1 to tie to another
                    parameter. This allows bindings across
                    groups.
           param2 - The parameter to link param1 to. Syntax as param1.
                    Parameter expressions:
                    Additional there is the possibility to use as
                    param2 a complete expression which may contain
                    all valid IDL operators/functions. The parameter
                    are referred with their absolute number in "P(<number>)".
                    It is possible to combine several other
                    Parameters.
                    Example:     tie, 5, "0.5*P(2) + sin(P(3))"
                               -> tie parameter 5 with parameters 2 and 3 within a
                                  complex formula.
           group2 - The group of param2. It is not possible for
                    tie expressions to refer to different groups.

           Changes parameter tied tag.

               > tie, 0:0, 0:1
                 -> Parameter 0 of group 0 becomes parameter 0 of
                    group 1, i.e. while fitting the first parameter
                    will be changed as the second parameter, and the
                    degree of freedoms will be reduced.

           $Id: cafe_tie.pro,v 1.7 2003/11/05 15:10:44 goehler Exp $

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