关于用MATLAB拟合一组数据,得到函数的表达式答:y=[9,12,18,21,12,26,29,36,50,101,192,245,233,117,28,9];p=polyfit(x,y,11);xx=linspace(9,39,100);yy=polyval(p,xx);plot(x,y,'o');hold on plot(xx,yy,'r');hold off legend('数据','拟合','location','northwest');title(poly2str(p,'x'));如果是正态分布 x...