例5-21.m

这是一个MATLAB7.0基础与提高例题的所有源码

>> [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