Created
May 1, 2012 07:12
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n=linspace(-4,4,30); | |
[X,Y]=meshgrid(n,n); | |
p=length(X); | |
q=length(Y); | |
Z = X.^2+2*Y-2*X; | |
surf(X,Y,Z); | |
hold on; | |
view(30,3); | |
% Mengambil data secara acak dari permukaan tadi. | |
R=(rand(p,q)>.7); | |
aa=find(R); | |
cc=length(aa); | |
M=zeros(cc,3); | |
h=1; %untuk iterasi element dari M | |
for i=1:p, | |
for j=1:q, | |
if R(i,j) | |
M(h,1)=X(i,j); | |
M(h,2)=Y(i,j); | |
M(h,3)=Z(i,j); | |
h=h+1; | |
end | |
end | |
end | |
stem3(M(:,1), M(:,2), M(:,3)+4, 'filled'); |
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