How do I specify a model asa FITTYPE object and not as a function using the Curve Fitting Toolbox?

How do I specify a model asa FITTYPE object and not as a function using the Curve Fitting Toolbox?

Answer 1

[MathWorks Support Team]

You can specify a FITTYPE object as your fit model in FIT function.

Use an object FITTYPE (different from CFIT). Here is an example which demsonstrates how to do this:

   f1 = fittype('a*x+b')

 f1 =

      General model:

        f1(a,b,x) = a*x+b

Now, you can use this model to fit different data set. For example:

x = 0:10; y = sin(x);

f2 = fit(x',y',f1)

 f2 =

   General model:

     f2(x) = a*x+b

   Coefficients (with 95% confidence bounds):

     a =    -0.02444  (-0.1812, 0.1323)

     b =      0.2505  (-0.677, 1.178)