How can I export a CFIT class variable to Excel?

I am using the Curve Fitting Toolbox to create generate polynomials of the type CFIT. I want to export the polynomial and the coefficients outside MATLAB such that other users who do not have MATLAB can look at the polynomial.

Answer 1

[MathWorks Support Team]

You can export the polynomial and the coefficients using the dot operator and getting the polynomial expression as an array of characters:

% create a CFIT class variable

f = fittype('a*x^2+b*exp(n*x)')

c = cfit(f,1,10.3,-1e2)

%get the polynomial expression as a string array

p = fevalexpr(f);

%export the polynomial and its coefficients to an Excel sheet

xlswrite('example',{p;c.a;c.b;c.n});