qxnh.asv

自己编写的曲线拟合程序

%曲线拟合05-07month
t=[1:26];
y=[87035 77121 97288 117412 119893 134271 132642 141041 284586 227135 198859 153887 133937 148675 178275 159857 158586 122734 99844 92224 96291 92278 102252 84482 103273 90874];
plot(t,y,'ko')
grid
p=polyfit(t,y,4)
%xi=linspace(1,26,160);
yi=polyval(p,t);
plot(t,y,'o',t,yi)