救命

422258511

syms t
x=2000/3*[3 10 20 30 40]';
y=[780.8 696.8 669.6 639.2 585.6]';
; a5 F- N" E1 q/ D$ kf=fittype('a*exp(b*t)','independent','t','coefficients',{'a','b'});
/ Q$ I2 \5 G) J* V% j  Icfun=fit(x,y,f);
xi=0:.1:20;
yi=cfun(xi);
" m2 r/ A7 a9 k% z- U0 [0 H) }0 Yplot(x,y,'r*',xi,yi,'-b');

怎么运行不了？急用，帮帮忙
& d! n$ M, ~. ^5 O, X

422258511

呵呵，发货的司法看得见啊