请问，lsqcurvefit拟合后如何显示相关系数R^2？

limopcb

请问，lsqcurvefit拟合后如何显示相关系数R^2，感谢！
clear;clc;
; z! T+ t1 F0 c3 X7 YT=[293.15        298.15        303.15        308.15        313.15];
c=[0.000378156        0.000425433        0.000562474        0.000684178        0.000981096];
TT=T';
cc=c';
x=[TT,cc];
, s! J/ B. b4 Q- M" l$ @  XHm=33509;
Tm=408.65;
4 c  C) e- I9 g4 Z0 na=0.3;
; ^  E# C; N- q  zfun=@(q,x)(-Hm.*(x(:,1)./Tm-1)./(8.314.*x(:,1))+log(x(:,2))+(1-x(:,2)).^2.*((q(1)./(8.314.*x(:,1))).*(exp(-a.*q(1)./(8.314.*x(:,1)))./(x(:,2)+(1-x(:,2)).*exp(-a.*q(1)./(8.314.*x(:,1))))).^2+(q(2)./(8.314.*x(:,1))).*exp(-a.*q(2)./(8.314.*x(:,1)))./(1-x(:,2)+x(:,2).*exp(-a.*q(2)./(8.314.*x(:,1)))).^2));
9 b2 \' s% l% u3 J! f5 B4 wq0=[0,0];
q=lsqcurvefit(fun,q0,x,zeros(size(x,1),1))
plot(x(:,1),x(:,2),'r^');hold on;
ezplot(@(x,c)fun(q,[x,c]),[290,314,0.0003,0.001]);
h=ezplot(@(x,c)fun(q,[x,c]),[290,314,0.0003,0.001]);
7 r# j5 r) V* M7 ~! J7 g

Allevi

非线性拟合，R2没有意义的
参考
# F- o. A. \" d" S9 E' q& `statisticsbyjim.com/regression/r-squared-invalid-nonlinear-regression
. M5 n" a" y& {( Pblog.minitab.com/blog/adventures-in-statistics-2/why-is-there-no-r-squared-for-nonlinear-regression