plot half of an ellipse with 2 lines at the end in matlab

main.m
% First, define the ellipse parameters
a = 5; % major axis length
b = 3; % minor axis length
x0 = 0; % x-coordinate of center
y0 = 0; % y-coordinate of center
theta = pi/4; % rotation angle of ellipse

% Next, generate a set of points on the half ellipse
t = linspace(0, pi, 100);
x = x0 + a*cos(theta)*cos(t) - b*sin(theta)*sin(t);
y = y0 + a*sin(theta)*cos(t) + b*cos(theta)*sin(t);

% Plot the half ellipse and add lines at the ends
figure;
hold on;
plot(x, y, 'b', 'LineWidth', 2);
plot([x(1), x(1)], [y(1), y(1)-2], 'k', 'LineWidth', 2);
plot([x(end), x(end)], [y(end), y(end)-2], 'k', 'LineWidth', 2);
axis equal;
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20 lines