Can anyone help me with a code for Runge-Kutta 4th Order for 3 coupled equations?

4 views (last 30 days)
Vineet Patel
Vineet Patel on 3 Nov 2018
Answered: Prakhar Jain on 12 Nov 2018
Hi All,
I need help with writing a code for Runge-Kutta 4th order equations.
The 3 equations are:
y_1' = -y_2 - y_3
y_2' = y_1 + (k_1 + y_2)
y_3' = k_2 + y_3(y_1 - k_3)
with initials of:
k_1 = k_2 = 0.2
k_3 = 5.7
Any help would be extremely appreciated.
Thank you
  1 Comment
John D'Errico
John D'Errico on 4 Nov 2018
Why not try it? Read the help and examples for ODE45. Or, are you asking someone to write a Runge-Kutta code for you?
If you insist, then why not look on the file exchange? Surely you can find some code there.

Sign in to comment.

Answers (1)

Prakhar Jain
Prakhar Jain on 12 Nov 2018
Hi Vineet,
You can start learning from here and how to code for Runge-kutta 4th order.
You can also compare your answer with the ODE45 in MATLAB.
Also, refer this file exchange link for further assistance.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!