Please go to the *Expert* fitting mode *Recover* the
``Expert-1'' example. This example refers to the fit of
eq. 3 but with the following assumption: if the value
of the first column is less than 0.1 then it is assumed that it refers
to a value of frequency, , and the data set was obtained for a
given value of ; if the value of the first column is larger that
0.1 then if refers to a value of mass and the data set was obtained
for a fixed frequency . The plots must therefore be
different. Please check the different menus and discover the
differences with respect to the previous example.

*PUsers* can take full advantage of this fitting mode since
they can program elaborated functions where the data sets can be
codded in such a a way that a n-dimensions fit can be performed.

Pedro SebastiĆ£o 2009-11-16