Ellipse and circle plot

May someone help me here

I want to plot an ellipse with origin at (0,0) and semi major axis 2 in horizontal direction and an eccentricity of 0.4.

on the same figire i want to plot a circel of radius 2 with origin at (0, 0).

Answer 1

[KSSV]

C = [0 0] ;  % center 
a = 2 ;      % major axis 
e = 0.4 ;    % eccentricity 
b = a*sqrt(1-e^2) ; % minor axis 
%
R = 2;  % Radius if cricle 
th = linspace(0,2*pi) ; 
% Ellipse 
xe = C(1)+a*cos(th) ; 
ye = C(2)+b*sin(th) ; 
% Circle 
xc = C(1)+R*cos(th) ;
yc = C(2)+R*sin(th) ;
% plot
plot(xe,ye,'b',xc,yc,'r')
axis equal