[Beginner] Constructing a rectangle object and detecting points inside
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Baptiste Labarthe
on 17 Apr 2021
Commented: Baptiste Labarthe
on 17 Apr 2021
Hello,
On a 2D environnement, I would like to create a rectangle object.
This being done, I would like to be able to detect from a vector of points (x,y), which one are inside the rectangle area and which one are outside.
Could someone help me please? :D
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Accepted Answer
Cris LaPierre
on 17 Apr 2021
Independently, I'd suggest the rectangle and inpolygon functions. However, to find the points inside the rectangle, I'd use patch instead of rectangle, since it gives you access to the x and y values of the shape.
x=4*rand(1,10)+1;
y=2*rand(1,10)+2;
% view data
scatter(x,y)
hold on
p = patch([2,4,4,2],[2 2 4 4],nan);
axis([1 6 1 5])
% find data points inside rectangle
in=inpolygon(x,y,p.Vertices(:,1),p.Vertices(:,2));
% replot data inside shape, this time filled in
scatter(x(in),y(in),'filled')
hold off
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