Plotting the iso-surface in a specific range of values

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hamed 2021-2-23

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评论： hamed 2021-3-16

采纳的回答： José M. Requena Plens

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Hi,

I have a 3D matrix and I want to show the isosurface for a range of values, such as the values greater than 0.2, not for a single value.

Could anybody help me to revise my code?

data = smooth3(porosity_median,'box',5);
p1 = patch(isosurface(data, 0.1 ), 'FaceColor','red','EdgeColor','none');
view(3); axis vis3d tight
camlight; lighting phong

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José M. Requena Plens 2021-3-15

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https://ww2.mathworks.cn/matlabcentral/answers/753614-plotting-the-iso-surface-in-a-specific-range-of-values#answer_648347

编辑：José M. Requena Plens 2021-3-15

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You need ISOCAPS with 'enclose' option.

Using yor code.

To plot values greater than 0.1:

data = smooth3(porosity_median,'box',5);
p1 = patch(isosurface(data, 0.1 ), 'FaceColor','red','EdgeColor','none'); 
p2 = patch(isocaps(data,0.1,'enclose','above'),'FaceColor','red','EdgeColor','none');
view(3); axis vis3d tight
camlight; lighting phong

To plot values lower than 0.1:

data = smooth3(porosity_median,'box',5);
p1 = patch(isosurface(data, 0.1 ), 'FaceColor','red','EdgeColor','none'); 
p2 = patch(isocaps(data,0.1,'enclose','below'),'FaceColor','red','EdgeColor','none');
view(3); axis vis3d tight
camlight; lighting phong

And I recommend that you use the ISONORMALS to better graphics.

isonormals(data,p1)

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José M. Requena Plens 2021-3-15

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The value you want to represent must be defined in both patches.

...
p1 = patch(isosurface(data, 0.3 ), 'FaceColor','red','EdgeColor','none'); 
...
p2 = patch(isocaps(data,0.3,'enclose','above'),'FaceColor','red','EdgeColor','none');
...