Determining area considering nodes arranged in space in an almost circular shape

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Alberto Acri
Alberto Acri 2024-1-16
回答： Dyuman Joshi 2024-1-16
Hi. I have the attached nodes arranged in space. I would like to calculate the area having the nodes as boundaries.
I'm trying this way but it doesn't seem to work (the blue line does not follow the red nodes).
figure
x = plane_new(:,1);
y = plane_new(:,2);
k = boundary(x(:),y(:));
plot(x,y,'.-r')
line(x(k),y(k))
A = polyarea(x(k),y(k));

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采纳的回答

Dyuman Joshi
Dyuman Joshi 2024-1-16
Ran in:
Directly use polyarea -
load('plane_new.mat')
x = plane_new(:,1);
y = plane_new(:,2);
plot(x,y,'.-r')
A = polyarea(x,y)
A = 42.3674

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