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NonlinearFit package


Dear Netters,

a very simple question : Does the NonlinearFit allow the use of complex
numbers and functions.  I tried to fit the complex refractive index of some
materials
and Mma did not seem to understand my command :
                NonlinearFit[complexindex, cn, {a, b, c, d}]
where   complexindex =  a list of complex indices as a function of energy
        cn = n + I k where n and k are also function of the energy and of
the parameters a, b, c, d.

Thank you in advance for any help,

Yves.
==============================================================================
Yves Verbandt                                   tel. 32-2-641.34.54
Applied Physics Dept.                           fax.             50
Vrije Universiteit Brussel                      email yverband at vnet3.vub.ac.be
Pleinlaan 2, 1050 Brussel, BELGIUM                    yverband at vub.ac.be
============================================================================
==






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