MATLAB Answers

0

How can I plot arrows over a function? (For ODE solution)

Asked by Oscar Ramos Soto on 14 Jun 2019
Latest activity Answered by Star Strider
on 14 Jun 2019
Hi! I want to plot arrows over a function , for example if I have a Sin(x) function, plot the arrows and its directions.
Maybe I'm not clear, so I'll let an example down here.
I've tried using quiver() but I cant get the results as the image below.
Thanks a lot.Captura de pantalla (843).png

  0 Comments

Sign in to comment.

1 Answer

Answer by Star Strider
on 14 Jun 2019
 Accepted Answer

Try this:
t = linspace(0, 2, 25);
h = t(2)-t(1);
s = sin(2*pi*t/max(t));
ds = gradient(s,h);
dt = gradient(t,h);
figure
quiver(t,s, dt,ds)
grid
producing:
How can I plot arrows over a function (For ODE solution) - 2019 06 13.png
This calculates the derivative from the data (here sin(t)). You may be able to recover your derivative directly from your ODE, so you may not need to calculate the gradient of your solved vector. I will leave that for you to determine.

  0 Comments

Sign in to comment.