# plot ellipses by clicking points?

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Ramesh Bala on 17 Sep 2018
Commented: Ramesh Bala on 17 Oct 2018
How to plot ellipses by clicking on the points. I have a 100*100 cm grid and I would like to generate ellipses in it by clicking different positions. Is there a way to do it? The ellipses can intersect and thereby I need to detect the high region of intersection.
Ramesh Bala on 18 Sep 2018
I believe imellipse is already a preloaded one where one just clicks and drag the ellipse, can it be modified based on the above case?

KSSV on 18 Sep 2018
Edited: KSSV on 18 Sep 2018
figure
hold on
axis equal
t=-pi:0.01:pi;
for i = 1:10
[x0,y0] = getpts() ;
x=x0(1)+a*cos(t);
y=y0(1)+b*sin(t);
plot(x,y)
drawnow
end
Ramesh Bala on 17 Oct 2018
Thanks for the comments; this is the overall script created. But the problem is that it's moving away from the boundary. Of course, I know it's based on the radii size as we mention, but is there any way to constrain that within boundary ??
function ellipsedrawon
clear
close uiopen
t=-pi:0.01:pi;
for i = 1:20
%getting the points
[x0,y0] = ginput(2) ;
% a =10;
% b =5;
% a = (x0(1)+x0(2))./2; % horizontal radii
b = (y0(1)+y0(2))./2; % vertical radii
% x,y ellipse plot
x=x0(1)+a*cos(t);
y=y0(1)+b*sin(t);
plot(x,y)
drawnow
end 