how to find mean point in a number of points in a circle

I have a circle with a few number of random points inside it. I divided the circle to four parts that separated the internal random points to each section of four. I want to find the mean point in each section and draw a line from center to the mean point of each section. This is my code until now:

function [randPoints]=hd04circle(xCenter,yCenter,r,n)

    drawCircle(xCenter,yCenter,r); hold on
    drawLine(xCenter,yCenter,r);
    %continuesPoints(xCenter,yCenter,r,n);
    randPoints=pointsInCircle(xCenter,yCenter,r,n); hold on
    %findMediumPoint(pointsArr,r,n);
    %for i=1:n
    %    drawCircle(randPoints(i,1),randPoints(i,2),r); hold on
    %end
%-----------------------------
function drawCircle(xC,yC,r)
    degree=0:0.01:2*pi;
    yp=r*sin(degree);
    xp=r*cos(degree);
    plot(xC+xp,yC+yp); hold on
%-----------------------------
function [randx,randy]=randNoGenerator(xC,yC,rc)
    a=2*pi*rand
    r=sqrt(rand)
    randx=(rc*r)*cos(a)+xC
    randy=(rc*r)*sin(a)+yC
%-----------------------------    
function continuesPoints(xCenter,yCenter,r,n)
    while true
        for i=1:n
            [x,y]=randNoGenerator(xCenter,yCenter,r);
            plot(x,y,'o'); hold all
            %drawCircle(x,y,r); hold on
        end
    pause(3);
    end
%-----------------------------
function [randPoints]=pointsInCircle(xCenter,yCenter,r,n)
    for i=1:n
        [x,y]=randNoGenerator(xCenter,yCenter,r);
        plot(x,y,'o'); hold all
        randPoints(i,1)=x;
        randPoints(i,2)=y;
    end
%-----------------------------
function drawLine(xC,yC,r)
    plot([xC-(2*r),xC+(2*r)],[yC,yC]); hold on
    plot([xC,xC],[yC-(2*r),yC+(2*r)]); hold on
%-----------------------------

[Image Analyst]

What is your definition of the "medium" point. Do you mean the point at the center of the circle?

[H D]

Running the code it is a circle divided to four sections. in each section there are a few number of random points. I need to draw a line from center to the point which is in center of the other points in the section. I think I made some spelling error. sorry