char4_4.m

matlab 文件

x=0:8;
y=sin(x);
x1=0:.1:8;
y1=interp1(x,y,x1,'nearest') ;
y2=interp1(x,y,x1,'linear') ;
y3=interp1(x,y,x1,'spline') ;
y4=interp1(x,y,x1,'cubic') ;
plot(x,y,'o-',x1,y1,'b--',x1,y2,'k:',x1,y3,'r-',x1,y4,'g-')
legend('原始数据','nearest','linear','spline','cubic')