插值算法的作用是什么?用来同步?如果有这个功能,麻烦介绍一下.
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(nearest、linear、cubic、spline)对peaks函数的插值效果图,函数命令如下:

[x y z]=peaks(10);

mesh(x,y,z)

[xi,yi]=meshgrid(-3:.1:3,-3:.1:3);

n=interp2(x,y,z,xi,yi,'nearest');

l=interp2(x,y,z,xi,yi,'linear');

c=interp2(x,y,z,xi,yi,'cubic');

s=interp2(x,y,z,xi,yi,'spline');

subplot(2,2,1);mesh(xi,yi,n);

subplot(2,2,2);mesh(xi,yi,l);

subplot(2,2,3);mesh(xi,yi,c);

subplot(2,2,4);mesh(xi,yi,s);