Plotting Nullcline of ODE

Dear All,

I am trying to plot the nullcline of a system of two ode's.I would like to ask for help to do the same.

The code containing the ode's can be found in the attachment. I tried following this post.But,I couldn't understand how the code has to be modified for my case.

I would like to obtain the nullclines for xdot(1) and xdot(3) in the code.(i.e.xdot(1)=0 and xdot(3)=0)

Any help would be much appreciated.

Many thanks for your time and kind consideration.

[Jan]

Please post the function as text or attached file. Providing the code through github has several disadvantages.

What have you tried so far to find the points, where xdot is zero (as fas as I understand, this is what you are asking for)? What about using fzero with your function f()?

[Deepa Maheshvare]

Sorry,if I wasn't clear .I have attached the file and edited the question.