INSTRUCTIONS

FITMOD can be executed as standalone application or as a MATLAB function

Two files are necessary: filename.in and filename.def, where filename can be passed

as argument (default filename is "fitmod")

The filename.in contains the data in two columns (x y). Additionally, a header including the

variables' names (separated by comma) can be added: "Xname, Yname"

The filename.def cotains the model definition:

   * Comments must start with %

   * The model is defined in DEFMODSTR

   * Fitting parameters are included in DEFMODSTR as A, B, C, ...

   * Non-fitting parameter values must be denoted as p1, p2, p3, ... and defined (e.g. p1=3.1416)

   * The parameter search requires either:
          a) The starting search values for A, B, C, ... between brackets in start_values
               (This option uses the Levenberg-Marquardt algorithm)
         

          b) The parameter search intervals between brackets in lower_bounds and upper_bounds.
               Additionally, definition of start_values is possible.   
               (This option uses the Trust-Region algorithm)

Three EXAMPLE files are included in this package ex1, ex2 and fitmod (default).

Examples for executing FITMOD