Can I obtain the coefficient of determination from the ROBUSTFIT function in the Statistics Toolbox?

I want the ROBUSTFIT function to return the coefficient of determination, usually denoted by "r^2", for the fit.

Answer 1

[MathWorks Support Team]

The ability to automatically return the coefficient of determination for the fit when using the ROBUSTFIT function is not available in the Statistics Toolbox.

If you have the Curve Fitting Toolbox, you can turn the "Robust" option to "on" with a linear polynomial fit to perform the same fit and obtain the coefficient of determination. Consider the following example:

x = (1:10)';

y = 10 - 2*x + randn(10,1);

fit_opts =  fitoptions('Method', 'LinearLeastSquares', 'Robust', 'on');

[fit_result, goodness, output] = fit(x, y, 'poly1', fit_opts)