How do I update my for loop iteration?

I am currently working through code to find sections in data where the y-values are equal to zero for at least 60 seconds. I included my current code down below. So far I can get the for loop to work for one iteration, but nothing else. I want to update the value for serach_start after each iteration to search_start = i+j+1; and repeat the code. How can I do that? Thank you for your help in advance.

for i = search_start:acc_end

if sum(Y_axis(i:i+60)) == 0

trial_end(a) = i;

for j = 30:min([5*30,(acc_end - trial_end(a))])

if Y_axis(trial_end(a) + j) > 0

trial_start(a+1) = i+j -1;

search_start=i+j+1;

break

end

end

a = a+1;

break

end

end

[Image Analyst]

Can you attach the data so we can run your program?

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Answer 1

[Vatsal]

Hi @Darianne Ynez Sanchez,

I understand that your code is working for the first iteration, and you want to update the “search_start” value dynamically. I am assuming that it is required to update “i”, which is the loop variable.

I am attaching the code below with my assumption that you want to update the loop variable “i” to “i+j+1” in the next iteration, and I am using a "while" loop instead of a "for" loop.

i = search_start;
flag = 0;
while i <= acc_end
    if sum(Y_axis(i:i+60)) == 0
        trial_end(a) = i;
        j = 30;
        while j <= min([5*30,(acc_end - trial_end(a))])
            if Y_axis(trial_end(a) + j) > 0
                trial_start(a+1) = i+j -1;
                i = i+j+1;
                flag = 1;
                break
            end
            j = j + 1;
        end
        a = a+1;
        if(flag == 0)
            i = i + 1;
        end
        break 
    else
        i = i + 1;
    end
end

I hope this helps!