How to plot a line of zero value on a surface?
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I used surf to generate a 3D surface and see it in 2D view (see below)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1230117/image.png)
The dataset and code are also attached.
X=[0 0.25 0.5 0.75]'; % 4*1 vector
load Y.mat % 36*4 matrix
load Z.mat % 36*4 matrix
figure
set(gcf,'position',[100,100,1000,750]);
surf(X, Y, Z, 'EdgeColor', 'none', 'FaceColor', 'interp');
hold on;
colormap(coolwarm(256)); caxis([-0.35 0.35]); colorbar;
patch([0,0.8,0.8,0],[0.8,0.8,0,0],[0,0,0,0],[1,1,1,1],'FaceAlpha',0.5,'EdgeColor',[0,0,0]);
grid off; view(2);
Now I want to plot the intersection of surface and zero-plane, can anyone help to with that? Thanks!
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Star Strider
le 13 Déc 2022
LD1 = load(websave('Y','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1230092/Y.mat'));
Y = LD1.Amp;
LD2 = load(websave('Z','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1230097/Z.mat'));
Z = LD2.Pnet;
X=(ones(size(Z,1),1)*[0 0.25 0.5 0.75]);
% 4*1 vector
% load Y.mat % 36*4 matrix
% load Z.mat % 36*4 matrix
figure
set(gcf,'position',[100,100,1000,750]);
surf(X, Y, Z, 'EdgeColor', 'none', 'FaceColor', 'interp');
hold on;
colormap(turbo(256)); caxis([-0.35 0.35]); colorbar;
patch([0,0.8,0.8,0],[0.8,0.8,0,0],[0,0,0,0],[1,1,1,1],'FaceAlpha',0.5,'EdgeColor',[0,0,0]);
contour3(X, Y, Z, [0 0], '-r', 'LineWidth',5)
grid off
view(-160,30)
% view(2);
The plane at ‘Z=0’ partially obscures the line.
.
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