Real Time Data Store in Inf Array

I have MPU6050 sensor. I had codes and I store in a 1x1 double array. But now I wanna filter it but I cant do it for real time. Because my filter needs at least 3 sample for filtering. And you know, in real time you need filter all datas 1 by 1.

After all I need to store my datas in zeros array. How can store real time "Acc_Mag" datas in "accmag = zeros (1,10000);" array?

[dpb]

You'll have to keep an index variable to point to the next point in the array for longer time series.

[Can Burak Kavuncuoglu]

Can you explain it with function, please? I have same idea but its just a idea. I tried to do it but still i have same error.

Error using filtfilt>getCoeffsAndInitialConditions (line 182)
Data length must be larger than 3 samples.

Answer 1

[David K.]

If I understand correctly what you want and a guess at how you are formatting it.

Pointer = 1;
window = sizeFilter % However big you want the filter

while (running) 
    data = newData; % new 1x1 double
    window(Pointer) = data;
    % if order matters for your filter you can also use the pointer as indication for that
    filteredData = filter(window);
    
    Pointer = Pointer+1;
    % Loop pointer 
    if Pointer >window
        Pointer = 1;
    end   
end

Unless all you want to do is save the initial data. Then that is simply

accmag = zeros(1,10000);
Pointer = 1;
while(running)
    data = newData;
    accmag(Pointer) = data;
    Pointer = Pointer + 1;
end