How to choose/change an isovalue

3 次查看（过去 30 天）

Sana Ahmed 2020-4-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517463-how-to-choose-change-an-isovalue

编辑： darova 2020-4-13

I have a script plotting eigenvectors using isosurface but I want to change the level that they are plotted on. As I have it now, it won't plot anything unless the isovalue is 0 (or if the temp array is flipped, then the isovalue must be n). How do I change this so that I can plot the vectors on different levels based on the content of the vector?

n = 15;
G = numgrid3d(n);
A = delsq3d(G);
m = n - 2;
p = m^3;
[V,D] = eigs(A,p);
vector = V(:,p-7);
vector = reshape(vector, [m,m,m]);
temp = (n/m:n/m:n);
x = zeros(m,m,m);
for i = 1:m
     for j = 1:m
         x(:,i,j) = temp(i);
     end
end
y = zeros(m,m,m);
for i = 1:m
    for j = 1:m
        y(i,:,j) = temp(i);
    end
end
z = zeros(m,m,m);
for i = 1:m
    for j = 1:m
        z(:,:,i) = temp(i);
    end
end
figure(1)
plot = patch(isosurface(x,y,z,vector,0));
isonormals(x,y,z,vector,plot)