% Convert temperature and conductivity vectors to column format for matrix operations t1 = t1(:); k1 = k1(:); % Transform the model equation into a linear form: % 1/k = (c1 / T) + c2*T^2 => y = A*z where y = 1/k, A = [1/T , T, T^2], z = [c1; c2] y = 1./k1; % Dependent variable (1/k) A = [1./t1,t1, t1.^2]; % Design matrix with independent terms