[X,Y] = meshgrid(-3:.25:3);
Z = peaks(X,Y);
%定義原圖形的數(shù)組
[XI,YI] = meshgrid(-3:.125:3);
%定義插值的X、Y坐標
ZI = interp2(X,Y,Z,XI,YI);
%采用雙線性插值返回圖形數(shù)組XI、YI、ZI（XI、YI已知）
mesh(X,Y,Z), hold, mesh(XI,YI,ZI+15)
hold off
axis([-3 3 -3 3 -5 20])