Inserting a circle at specific coordinates

I have a group of data, which when plotting gives me a circle. I want to have the circles center to be at (-1,1)in another plot of data.

How do i do this?

I hope someone can help me, thank you :)

[Dishant Arora]

Add centre co-ordinates to your x and y data and then plot.

Answer 1

[Mischa Kim]

Rasmus, for the general case (circle with noise) check out this entry in the File Exchange. The app will give you radius R and the center of the circle (xc,yc). With this data you can then simply

 t     = linspace(0,2*pi,100);
 x_new = R*cos(t) + xc_new;
 y_new = R*sin(t) + yc_new;
 plot(x_new,y_new)

[Mischa Kim]

If your add-on question is about adding the circle to another plot then use

 hold on

before the plot commands.

Answer 2

[Rasmus]

sorry I just edited the question, as I forgot to mention something.