Code using Curve Fitting Toolbox with Customized Function

Is it possible to write an automated code using the Curve Fitting Toolbox to fit data to a customized function? Example

clc
format short e
x = xdata
y = ydata;
f = fit(x,y,'Desired_Function')
plot(f,x,y)

Where desired function is something outside the usual default functions of Matlab. I usually need to make a fitting inside a bigger program and the fitting functions go beyond what Matlab offers in its library.

Answer 1

[Torsten]

You can supply an arbitrary anonymous function as fittype:

http://de.mathworks.com/help/curvefit/fit.html#bto2vuv-11

Best wishes

Torsten.

[Saeid]

Danke Tortsen!