How can I save 'H' using Runge-Kutta time-step in a single . mat file each day while the code will be running for six days?

dt=90; % 90 seconds
tend=1:6;% for six days  
time = zeros ((3600/dt)*24*tend,1);

%Runge-Kutta time step
for nt=1:tend*24*3600/dt
   K = H;
   d1 = dt*Chs(K,A,B,C,D);
   K = H + 0.5*d1;
   d2 = dt*Chs(K,A,B,C,D);
   K = H + 0.5*d2;
   d3 = dt*Chs(K,A,B,C,D);
   K = H + d3;
   d4 = dt*Chs(K,A,B,C,D);
   H = H + 1/6*(d1 + 2*d2 + 2*d3 + d4);

time(nt,1) =(nt*dt)/(3600*24);
I need help on how to save H each day in single .mat file for six days while the code is running.

Answer 1

[KALYAN ACHARJYA]

Alert: I have no experience running code for six days. I also do not know the system requirements for this work. But here, based on my theoretical concept. You can stop the running execution anytime by CLTR+C. Please note I just tried to implement e the idea (ignoring the time of execution of instructions).

time=518400; %Total seconds in 6 days
dt=90;
tic
k=1;n=1;
while toc>time
  %code
  H(n)=
  time_day=toc;
if time_day>=k*86400 %One day seconds
    save(['Day' num2str(k) '.mat'],'H')
    k=k+1;
    n=0;
end 
n=n+1;
pause(90);
end 

[Kayode Odeyemi]

Thanks, but it doesn't work well.

      time=518400; %Total seconds in 6 days
      dt=90;
      tic
      k=1;n=1;
      while toc>time
        %code
     H(n)= ?? %Not  clear
        time_day=toc;
      if time_day>=k*86400 %One day seconds
          save(['Day' num2str(k) '.mat'],'H')
          k=k+1;
          n=0;
      end 
      n=n+1;
      pause(90);
      end