Special Nonlinear Fitting?

*To*: mathgroup at smc.vnet.net*Subject*: [mg2368] Special Nonlinear Fitting?*From*: f91el at efd.lth.se (Erik Lindahl)*Date*: Sun, 29 Oct 1995 22:48:14 -0500*Organization*: Lund Institute of Technology, Sweden

Hi, I need to do a nonlinear fitting of data to a function, where I can't get an explicit expression for the functions value. Let me give you an example: Assume I have the data point as pairs {x,y} I want to "solve" the following relationship for the parameters a and b: Y^2/X*f[Y^2/(X*a)]=b*given function of X. with f[z]=z/Sqrt[1+z^2]... Is there any procedure capable of this? I must be able to enter an equation as the model, and state that "Y" is the data value at each point. Ideas, anybody? Regards, Erik -- ------------------------------------------------------------ Erik R. Lindahl f91el at efd.lth.se Lund Institute of Technology, Lund, SWEDEN