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plotting four variable using meshgrid for 3 variables, but i am getting error
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t=0.2;
p=1;
for kx = -3:.1:3
q=1;
for ky = -3:.1:3
r=1;
for kz = -3:.1:3
energy_ary(p,q)= -2*t*(cos(kx)+cos(ky)+cos(kz));
z_ary(r)= kz;
r=r+1;
end
y_ary(q)= ky;
q=q+1;
end
x_ary(p)=kx;
p=p+1;
end
x = x_ary ;
y = y_ary ;
z = z_ary ;
[XX,YY,ZZ] = meshgrid(x,y,z);
EE = energy_ary' ;
surf(XX,YY,ZZ,EE) ;
hold all
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Accepted Answer
Walter Roberson
on 31 Aug 2023
meshgrid with 3 inputs always returns 3 dimensional outputs (unless the third input just happens to be scalar.) So your XX, YY, and ZZ are all going to be 3D. But surf() requires that the first two coordinate systems be either vector or 2D, and that the third coordinates be 2D.
surf() is not suitable for creating 3D cuboid volumes with a value for each interior voxel.
If you have three independent input variables and one dependent output variable, then you should consider: slice or isosurface or volshow
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