How to evaluate the union area of the multiple circles plotted in matrix form of centers and radii?
3 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/917629/image.png)
Specially looking for the area inside the rectangle covered by the union of circles...
0 commentaires
Réponse acceptée
Matt J
le 7 Mar 2022
Modifié(e) : Matt J
le 7 Mar 2022
An approximate calculation can be made as follows,
C={centreG1,centreG2,centreG3,centreG4,centreG5,centreG6};
p=cellfun(@polycircle,C,{radii});
Area=area(union(p))
function p=polycircle(center,R)
p=translate( nsidedpoly(1e4,'Radius',R), center);
end
13 commentaires
Plus de réponses (1)
Steven Lord
le 7 Mar 2022
A different approach, one that doesn't involve cell arrays or cellfun:
center = randi(10, 6, 2); % 6 circle centers
radius = randi(5, 6, 1); % 6 circle radii
% Iterate backwards so the first assignment to C allocates
% the right number of elements
for whichCircle = size(center, 1):-1:1
% Approximate each circle with a 1000-sided polyshape
C(whichCircle) = nsidedpoly(1e3, ...
'Center', center(whichCircle, :), ...
'Radius', radius(whichCircle));
end
plot(C)
axis equal
A = area(union(C))
3 commentaires
Steven Lord
le 7 Mar 2022
This sample code focused on creating some sample circles. You can take it and adapt it to suit your additional requirements.
Voir également
Catégories
En savoir plus sur Line Plots dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!