spline.m

matlab 插值 有配套的说明和讲解实例

 clear
clear
x=-4:4;
y=[0 0.15 1.12 2.36 2.36 1.46 0.49 0.06 0];
cs=spline(x,[0 y 0]);
xx=linspace(-4,4,101);
yy=ppval(cs,xx);

yyt=interp1(x,y,xx,'spline');
plot(x,y,'o',xx,yy,'g.');hold on
plot(xx,yyt,'m','linewidth',1.5)
grid on