fg=figure;
disp('Let''s draw a nice picture');
disp('When finished, press right mouse button');
[x,y,t]=ginput(1);
plot(x,y,'o');
xx=x; yy=y;
hold;
axis([0 1 0 1]);
while t~=3
    [x,y,t]=ginput(1);
    plot(x,y,'o');
    xx=[xx,x]; yy=[yy y];
end
clf;
line(xx,yy)
disp('Click on figure when finished');
waitforbuttonpress
delete(fg)