How to plot a circle of some radius on a polar plot, when the circle is not centered in the origen?

eg. i want a small circle with other point as center of some radius...ON the POLAR plot

[Adam Danz]

The easiest approach would be to use the rectangle function with the curvature option to make circles and to fill all of them.

Plot them in order from bottom to top with the top most circle being white.

Answer 1

[Gabriel Malagon Carvajal]

xCenter = 12; yCenter = 10; theta = 0 : 0.01 : 2*pi; radius = 5; x = radius * cos(theta) + xCenter; y = radius * sin(theta) + yCenter; %[theta,rho] = cart2pol(x,y) [abtheta,abrho] = cart2pol(x,y); polar(abtheta,abrho,'o'); %centerDeltacurrent

[Jose Marques]

Did not work, Gabriel?

Answer 2

[Jose Marques]

Hello Gabriel Malagon Carvajal. You can try this:

%k is a constant that you can difine as the circles size
k = 0.4  %a exemplo of a 0.4 diamater circle
theta = linspace(0,2*pi);
rho = k*sin(theta);
polarplot(theta,rho)

[Gabriel Malagon Carvajal]

Thk Jose, I have a point in polar plot (theta, rho) and i want to fix this point as center.

[Gabriel Malagon Carvajal]

[Jose Marques]

You can change the values of radius, x_center and y_center:

radius = 1;
x_center = 0.5;
y_center = 0.5;
th = 0:pi/50:2*pi;
xunit = radius * cos(th) + x;
yunit = radius * sin(th) + y;

[theta,rho] = cart2pol(xunit,yunit)
polarplot(theta,rho)

[Gabriel Malagon Carvajal]

Thks Jose Marquez