Make a dynamic line plot

I have a vector Y and X. I want to make a dynamic 2D line plot that is updated as a new point is added to the X and Y.

 X=[1 2 3];
 Y=[5 6 7];

 for i=0:20
 X=[X, i];
 Y=[Y,i*2];
   ?? how to make dynamic Y vs X line plot?
 end

Answer 1

[Azzi Abdelmalek]

close
X=[1 2 3];
Y=[5 6 7];
plot(X,Y)
hold on
for i=4:20
  X=[X, i];
  Y=[Y,i*2];
  plot(i,i*2,'*')
  pause(1)
end

Answer 2

[Parisa Sadeghi]

Can the dynamic plot be embedded in a powerpoint presentation in the form of a movie?

Thanks