exa5_21.m

来自「有关matlab r2007的实用教程」· M 代码 · 共 12 行

[X,Y,Z]=peaks(30);
x=X(1,:);
y=Y(:,1);
i=find(y>0.8&y<1.2);
j=find(x>-0.6&x<0.5);
Z(i,j)=nan*Z(i,j);
surf(X,Y,Z)
title('surf  of peaks with a hole')
grid on