I wish to know the algorithm which MATLAB uses for determining R^2 in the following expressions?
- rsq2 = 1 - norm(p1-p)^2 / norm(p1-mean(p1))^2
- R = corrcoef(p,p1); Rsq = R(1,2).^2
In the above expressions, p respresents the model fitted value and p1 represents the experimental data.
Thanking you in advance.