how to add "drawnow" function in it?

ti = 0;
tf = 1E-2;
tspan=[ti tf];
y0 = [(10E-6).*rand(6,1);((-3.14).*rand(2,1) + (3.14).*rand(2,1))]; % intial conditions
o = sort(10e3*rand(1,2),'ascend'); %detuning frequency
tc = 10E-6;
[T,Y]= ode45(@(t,y) rate_eq(t,y,o),tspan,y0);

% I want to plot this by using "drawnow" for this, how can I add here?
plot3(Y(:,4),Y(:,5),Y(:,6));
xlabel("A1");
ylabel("A2");
zlabel("A3")
grid on

function dy = rate_eq(t,y,o)

dy = zeros(8,1);

P = 0.2;
a = 0.1;
tf = 230E-6;
tc = 30E-9;

k = 1E-3;

dy(1) = (P - y(1).*((abs(y(4)))^2 +1))./tf;
dy(2) = (P - y(2).*((abs(y(5)))^2 +1))./tf;
dy(3) = (P - y(3).*((abs(y(6)))^2 +1))./tf;


dy(4)= (y(1)-a).*((y(4))./tc) + (k./tc).*(y(5)).*cos(y(7));
dy(5)= (y(2)-a).*((y(5))./tc) + (k./tc).*(y(4)).*cos(y(7)) + (k./tc).*(y(6))*cos(y(8));
dy(6)= (y(3)-a).*((y(6))./tc) + (k./tc).*(y(5)).*cos(y(8));


dy(7) = o(1,1) - (k./tc).*((y(4)./y(5)) + (y(5)./y(4))).*sin(y(7)) + (k./tc).*(y(6)/y(5)).*sin(y(8));
dy(8) = o(1,2) - (k./tc).*((y(5)./y(6)) + (y(6)./y(5))).*sin(y(8)) + (k./tc).*(y(4)/y(5)).*sin(y(7));
end

[Torsten]

Since this is not an animated plot, you don't need "drawnow". The plot won't appear faster using this command.

Answer 1

[Jan]

The answer is trivial: simply add a drawnow command at the end of the code.

But the question remains, what the purpose is. You will not see any difference to the current code. So maybe you want to do something else and the assumption, that drawnow will do this, is not correct. So please explain, what you want to achieve.

Maybe you want an animated point?

axesH = axes('XLabel', 'A1', 'YLabel', 'A2', 'ZLabel', 'A3', ...
    'NextPlot', 'add', 'XLim', [0, 20], 'YLim', [0, 20], 'ZLim', [0, 20]);
grid('on');
dotH = plot3(Y(1,4),Y(1,5),Y(1,6), 'g.');
for k = 2:size(Y, 1)
   pause(0.05);  % calls DRAWNOW implicitly
   set(dotH, 'XData', Y(k,4), 'YData', Y(k,5), 'ZData', Y(k,6));
end