exm04121_2.m

matlab mfiles实例分析

theta=[0:0.5:2]*pi;											%产生四个样点
y=[-0.5 1 -0.5 -1 0.5 1 -0.5;0.5 1 0.5 -1 -0.5 1 0.5];	%<3>
theta2=linspace(theta(1),theta(end),50*length(theta));	%参量稠密化
yy=spline(theta,y,theta2);									%求稠密点上的插值
plot(yy(1,:),yy(2,:),'b');hold on
plot(y(1,:),y(2,:),'or');hold off,axis('image')