Index out of bounds error even when there ARE enough elements in array

Gabriela - 2021-01-06T09:37:17+00:00

Question: Index out of bounds error even when there ARE enough elements in array

I get the error '??? Attempted to access corr_up(2e+006); index out of bounds because numel(corr_up)=2000001.'   I am looping over a correlated signal looking for threshold cross but continue to get this error. When I attempt to access this element of the array explicitly, 'disp(corr_up(2e+006));` or even 'disp(corr_up(2000000));' , it works without error.   Any ideas into this problem. There seems to be enought elements but still getting index out of bounds. i = 1; threshold = max_up/2; while i < length(corr_up) % <--- error thrown here... while corr_up(i) < threshold i = i + 1; end start_of_ping_upsweep = [start_of_ping_upsweep i]; i = i + 0.03*Fs; % look ahead 3 pulse lengths before searching for threshold cross again. end ... ??? Attempted to access corr_up(2e+006); index out of bounds because numel(corr_up)=2000001. Error in ==> check_if_upchirp_or_downchirp_for_90kwqx at 50 while corr_up(i) < threshold

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Expert Answer

Prashant Kumar answered . 2025-11-20

        while corr_up(i) < threshold
            i = i + 1;
        end

        while i <= length(corr_up) && corr_up(i) < threshold
            i = i + 1;
            if i > length(corr_up)
                break;
            end
        end

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