plotting four variable using meshgrid for 3 variables, but i am getting error

Question

Zahid 2023-8-31

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2015241-plotting-four-variable-using-meshgrid-for-3-variables-but-i-am-getting-error

Locked: Rena Berman 2024-6-5

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

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) ;

Error using matlab.graphics.chart.primitive.Surface
Value must be a vector or 2D array of numeric type.

Error in surf (line 145)
hh = matlab.graphics.chart.primitive.Surface(allargs{:});

hold all

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Rena Berman 2024-6-5

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Answer 1

Walter Roberson 2023-8-31

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2015241-plotting-four-variable-using-meshgrid-for-3-variables-but-i-am-getting-error#answer_1297986

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