救命

422258511

syms t
x=2000/3*[3 10 20 30 40]';
y=[780.8 696.8 669.6 639.2 585.6]';
f=fittype('a*exp(b*t)','independent','t','coefficients',{'a','b'});
& N7 i& E* J0 Y! ^5 M5 N7 hcfun=fit(x,y,f);
. t+ U/ G- {: `8 G' {8 nxi=0:.1:20;
8 a9 E: I! G% i" \. M7 ~) Hyi=cfun(xi);
plot(x,y,'r*',xi,yi,'-b');
) |! Q( R1 `' L3 v" e! Q6 h0 y
! k, I, ?$ k5 o7 T+ b怎么运行不了？急用，帮帮忙

422258511

呵呵，发货的司法看得见啊