How to solve warning: division by zero

[이태훈]

Hi all 

I use this code for my work, Whenever I run this, I get this:

 warning: division by zero

warning: called from

    EulerExplict at line 25 column 11

Can you help me to solve this problem?  

Code:

% Solve ODE-IVP using Euler's Explict Method

  

   t0 = 0 ;

   y0 = 9.8;

   tEnd = 5;

   h= 0.1;

   N = (tEnd.-t0)./(h);

   D=1.1;

   r=0.0984;

   ka=3;

   z=10;

   umax=0.08;

   km=3;

   I0=1;

   

   

   %%Initializing Solution

   

   T = [t0:h:tEnd]';

   Y = [N+1,1]';

   y(1) = y0;

   

   %% Solving using Euler's Explicit Method 

   for i= 1:N

       fi = 20.*2.717.^((umax.*(I0.*2.717.^(((-3).*(Y(i)).*(z))./(I0.*2.717.^((-3).*(Y(i)).*(z))).+km))-D).*T(i));

       Y(i+1) = Y(i).+(h.*fi);

     

     end

       

   

   disp(Y)

   plot(T,Y);