Thread Subject:

Isosurface transposed X,Y axes?

Can someone explain this?

E=zeros(100,100,100);
for x=1:100
 for y=1:100
  for z=1:100
   E(x,y,z)=norm([x y z]-[10 20 30]);
  end
 end
end

patch(isosurface(1:100,1:100,1:100,E,10))

One might expect a sphere centered on (10,20,30) of radius 10. Right? However,

hold on
plot3(10,20,30,'o')

does not put an 'o' in the center of the sphere. Why not? It appears to be transposed in x/y. If I loop through z and transpose all the x/y sub-matrices, it looks as I would expect. Am I doing something wrong?