animatedSin.m

% animated sine graph
x = 0;
y = 0;
dx = pi/40;
p = plot(x, y, 'o', 'EraseMode', 'none'); % 'xor' shows only current point
                                          % ' none' shows all points
axis([0 20*pi -2 2])

for x = dx:dx:20*pi;
    x = x + dx;
    y = sin(x);
    set(p, 'XData', x, 'YData', y) 
    %drawnow
    pause(0.05)
end