How to plot left semi_circle in matlab? (Given, x(origin), y(origin) and r(radius) of the circle)?

I was just wandering how to plot left semi circle. given x,y and radius of the circle.

For example, x=5, y=10, r=3

Answer 1

[Adam Danz]

How to plot left semi circle:

The key is to compute theta values between pi/2 and 3*pi/2.

x=5;      
y=10;
r=3;

theta = linspace(pi/2, 3*pi/2, 100);  % <-- left half of circle
xCirc = r * cos(theta) + x;
yCirc = r * sin(theta) + y;

cla()
plot(xCirc, yCirc)
axis equal
grid on
xline(x)
yline(y)

Answer 2

[Image Analyst]

See the FAQ: https://matlab.fandom.com/wiki/FAQ#How_do_I_create_an_arc.3F