how to store and use previous values of a variable in simulink during simulation?

So I would like to be able to store values and DURING the simulation being able to take 'N' samples that was calculated before and use them . (say like last 500 samples)

Yes I know that you can use delays for the example but what I would like to program is more complicated than the example so using delays is not an option.

Thanks ,

Vemuri

[Kaustubha Govind]

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Answer 1

[Kaustubha Govind]

As far as I know, using some of form of delays is the only way to store values from previous time-steps. Perhaps you could explain why delays are not adequate?

[Sri hari Krishna]

this is the part of my code i am facing the problem with, When used in a normal code it works fine. when i try to embed the same thing in my simulink model.. it says "Simulation stopped due to out of bounds error. Enable debugging to pinpoint the location of the error". So How do I get it fixed , so as to access the previous values during simulation???

' if (mod(t,500)==0) %---detection

        e1=sum(error(t-249:t).^2);%latest
        e2=sum(error(t-499:t-250).^2);%previous 
        itr=itr+1;
     end