救命

422258511

syms t
x=2000/3*[3 10 20 30 40]';
( O3 ~% I6 a5 O% @8 s: X! F1 S7 J$ vy=[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);
xi=0:.1:20;
yi=cfun(xi);
+ s3 n6 n2 S$ |- ]# l* ~5 Iplot(x,y,'r*',xi,yi,'-b');

4 g1 j' Z7 M. r( a$ n怎么运行不了？急用，帮帮忙

422258511

呵呵，发货的司法看得见啊