graf2.m

该代码为原创

x=[0.301030,0.477121,0.602060,0.698970,0.903090,1.000000,1.113943,1.204120,1.301030,1.397940,1.491362,1.602060,1.698970,1.799341,1.903090,2.000000,2.096910,2.198657,2.301030,2.399674,2.499687,2.599883,2.699838,2.800029,2.899821,3.000000,3.099681,3.200029,3.299943,3.400020,3.499962,3.599992,3.700011,3.799961];
y=[-3.103187,-3.266458,-3.380644,-3.472766,-3.655123,-3.740683,-3.836994,-3.916032,-3.994665,-4.070656,-4.128664,-4.226282,-4.297100,-4.380333,-4.455760,-4.510661,-4.570622,-4.625479,-4.691195,-4.713183,-4.770100,-4.790245,-4.841840,-4.869069,-4.887984,-4.914715,-4.929654,-4.941237,-4.992222,-4.992038,-5.032488,-5.090250,-5.088647,-5.140952];
p=pline(x,y)
y1=polyval(p,x);
plot(x,y1)
hold on
grid on
plot(x,y,'.')