How to plot contur in 3 D

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Skydriver 2020-3-31

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/514169-how-to-plot-contur-in-3-d

评论： Skydriver 2020-4-4

Contour.xlsx

I have a result calculation and I want to make plot contur in 3 D. From the excel files attxhed I also plot in two dimension of FzWz vs Depth

What is the appropriate Matlab function to create contur in 3 D of FzWz vs Depth

I attach the data file about the data.

Thank you for your kind attention

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Akira Agata 2020-3-31

I believe contour3 can do that task.

But, looking at you data, there are several sheets in Excel file, and each sheet contains ~20 data.

I don't think 20 data points is sufficient to make contour plot. Do you want to concatenate all the data ( = 20 x number of sheet) before making a contour?

Skydriver 2020-3-31

编辑：Skydriver 2020-3-31

Yes, but I don't know how to generate this countur, because I only have two values depth and FzWz. In generating 3d I saw I need X, Y and Z. Can you show me how to do that plotting?

I also have the coordinate / geographical position but I am not sure it will help

Thank you

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Answer 1

Akira Agata 2020-3-31

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/514169-how-to-plot-contur-in-3-d#answer_423022

在 MATLAB Online 中打开

OK. Then, how about the following?

% Read all the data in the Excel file
T = table();
for kk = 1:8
  Ttmp = readtable('Contour.xlsx','Range','A:D','Sheet',kk);
  T = [T; Ttmp];%#ok
end
% Interpolate the data
% **Note: Since there is duplicated data point, griddata returns Warning**
[xGrid, yGrid] = meshgrid(...
  linspace(min(T.Fz),max(T.Fz),20),...
  linspace(min(T.wz),max(T.wz),20));
zGrid = griddata(T.Fz,T.wz,T.Depth,xGrid,yGrid);
% Show the result
figure
contour3(xGrid,yGrid,zGrid)
hold on
scatter3(T.Fz,T.wz,T.Depth)
xlabel('Fz','FontSize',14)
ylabel('wz','FontSize',14)
zlabel('Depth','FontSize',14)
colorbar
ax = gca;
ax.View = [-80 40];