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How to calculate the area between X-Axis, Y-Axis and the (60) contour line?

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ly 2024-1-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2073516-how-to-calculate-the-area-between-x-axis-y-axis-and-the-60-contour-line

编辑： Matt J 2024-1-24

采纳的回答： Matt J

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How to calculate the area between X-Axis, Y-Axis and the (60) contour line?

Code of the contour line:

x = 1:0.2:2;
y = 1:0.2:3;
[X,Y] = meshgrid(x,y);
Z = 1000*(X.*exp(-X.^2-Y.^2));
contour(X,Y,Z,[20 60 80],'ShowText','on')

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采纳的回答

Matt J 2024-1-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2073516-how-to-calculate-the-area-between-x-axis-y-axis-and-the-60-contour-line#answer_1395891

编辑：Matt J 2024-1-24

在 MATLAB Online 中打开

Using this FEX download,

https://www.mathworks.com/matlabcentral/fileexchange/74010-getcontourlinecoordinates

x = 1:0.2:2;

y = 1:0.2:3;

[X,Y] = meshgrid(x,y);

Z = 1000*(X.*exp(-X.^2-Y.^2));

cm=contour(X,Y,Z,[20 60 80],'ShowText','on');

[~, V]=getContourLineCoordinates(cm);

p=polyshape([1,1; V{2}]);

hold on;

plot(p);

hold off

Area=area(p)

Area = 0.1006

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MATLAB Graphics 2-D and 3-D Plots Contour Plots

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