YEs you can draw such circles, using:
th = linspace(0,2*pi) ;
r = 1;
c = [ 0 0] ;
x = c(1)+r*cos(th) ;
y = c(2)+r*sin(th) ;
patch(X,y,'r')
Also you can show them by using markers, you can give the markers size, color and shape.
To draw arrow read about quiver, annotation.
