How to get coordinates for a specific contour line?

Question

Sk Zeeshan Ali 2020-1-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501139-how-to-get-coordinates-for-a-specific-contour-line

编辑： Sk Zeeshan Ali 2020-2-17

I have the program as follows:

x = -2:0.2:2;
y = -2:0.2:3;
[X,Y] = meshgrid(x,y);
Z = X.*exp(-X.^2-Y.^2);
contour(X,Y,Z)

Now, I want to get a two-column matrix C that will give the (x,y) coordinates of a specific contour line, let us say for Z = 0.1. So, how to get this two-column matrix?

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Answer 1

Claudio Iturra 2020-1-20

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501139-how-to-get-coordinates-for-a-specific-contour-line#answer_411115

编辑：Image Analyst 2020-1-21

在 MATLAB Online 中打开

x = -2:0.2:2;
y = -2:0.2:3;
[X,Y] = meshgrid(x,y);
hold on % to your meshgrid a specific value for your contour.
[x1,y1] = contour(X,Y,Z,[0.1 0.1],'*k') % x1 will be your "two-column matrix"