curvefit01.m

来自「数值分析与计算的PPT幻灯片与MAT源码」· M 代码 · 共 14 行

%curvefit01.m

x0=0:0.1:1;
y0=[-.447,1.978,3.11,5.25,5.02,...
     4.66,4.010,4.58,3.45,5.35,9.22];
n=3;
a=polyfit(x0,y0,n)
digits(6)
p3=poly2sym(a)
xx=0:0.01:1;
yy=polyval(a,xx);
plot(xx,yy,'-b',x0,y0,'.r','MarkerSize',20)
xlabel('x')