Hi,

I have a problem with an itterative set of differential equations and im not sure how to put them in mat lab.

the three functions are :

u =[0.25*s]/[0.005 + s] ... 1

dxdt = ux ...2

dsdt=-0.42*ux ...3

It starts by inputting s0 into equations 1 as 0.1, and generating a value for u.

This value of u generated is then used in equation 2 to get a new value for x.

Then this is used to get a new s, then s to get a new u and the process is repeated.

This will show me the change in x and s over time.

I started with the m file for u, which worked fine.

But when i tried to put the function in for dxdt into an mfile i couldnt do it.

I was wondering if anyone could provide me any help

Thanks Rem