Create a point with a number inside

I want to creat a fig:

How to creat a point with a number inside?

Answer 1

[Simon Chan]

r = 5;                              % Radius of small circle
rho = 50;                           % Radius of big circle
Np = 16;                            % Number of circle
theta = linspace(pi,-pi,Np+1);      
[x,y] = pol2cart(theta,rho);        % coordinates of small circle center 
t = linspace(0, 2*pi);
apoint = 1:Np;                      % Line connection, starting point
bpoint = circshift(1:16,-4);        % Line coonection, end point
for w = 1:Np
    line([x(apoint(w)) x(bpoint(w))],[y(apoint(w)) y(bpoint(w))],'Color','k');  % Draw lines first
end
rectangle('Position',[-rho -rho 2*rho 2*rho],'Curvature',[1 1])%                % Draw big circle 
for k = 1:Np
    patch(x(k)+r*cos(t), y(k)+r*sin(t), 'w','FaceAlpha',1);                     % Draw small circle
end
text(x(1:Np),y(1:Np),string(1:Np),'HorizontalAlignment','center');              % Add the text   
axis equal
axis off

[Askic V]

What an elegant solution. Bravo Simon.

Answer 2

[Walter Roberson]

viscircles() and text()

Or possibly use a quite large 'o' marker, and text()

Or create patch objects with face color white. fill() could be used for that.

Answer 3

[KSSV]

th = linspace(0,2*pi) ; 
x = cos(th) ;
y = sin(th) ; 
% Make numbers 
idx = 1:5:length(th) ;
figure
hold on
plot(x,y,'k','LineWidth',2)
scatter(x(idx),y(idx),300,'O','MarkerEdgeColor','k','MarkerFaceColor','w')
text(x(idx),y(idx),num2str(idx'))