create circle from x,y position with radius r in matlab

To create a circle with a given x,y position and radius r in Matlab, you can use the following code:

main.m
x = 0;    % x-position of center of circle
y = 0;    % y-position of center of circle
r = 5;    % radius of circle

theta = linspace(0, 2*pi);   % create a range of theta values from 0 to 2pi radians
x_circle = r*cos(theta) + x; % compute x values for the circle
y_circle = r*sin(theta) + y; % compute y values for the circle

plot(x_circle, y_circle);    % plot the circle using the computed x and y values
axis equal;    % scale x and y axes equally to preserve circular shape
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In this code, x and y specify the center position of the circle, and r specifies the radius. The linspace function is used to create a range of theta values (theta represents the angle around the circle) from 0 to 2pi radians. The values of x, y, r, and theta are then used to compute the x and y values for points that lie on the circumference of the circle using the equations x = r*cos(theta) + x and y = r*sin(theta) + y. Finally, the plot function is used to plot the x_circle and y_circle values to create the circle, and the axis equal command is used to make sure the x and y axes are scaled equally to preserve the circular shape.