救命

422258511

syms t
! u  T' d5 Z/ k  B3 Jx=2000/3*[3 10 20 30 40]';
3 m8 P  y0 G  J# _) `y=[780.8 696.8 669.6 639.2 585.6]';
f=fittype('a*exp(b*t)','independent','t','coefficients',{'a','b'});
cfun=fit(x,y,f);
3 i! `6 g% I$ y- |" {9 e7 Pxi=0:.1:20;
yi=cfun(xi);
plot(x,y,'r*',xi,yi,'-b');

* O( W4 N* V6 H6 ?8 g1 z* ~9 c( M3 J怎么运行不了？急用，帮帮忙
- D- N9 W8 H1 r9 u7 j8 ~, c. v

422258511

呵呵，发货的司法看得见啊