How to implement FIFO in MATLAB with continuous input

How to implement FIFO in MATLAB with continuous input.I dont have any idea about what is the frequency and magnitude in my problem statement.

[Sam Chak]

I do not recall encountering the term 'FIFO' in the magnitude plot of the frequency response for a continuous dynamic system. Could you please clarify?

G   = tf(1, [2 3 5])

G =
 
         1
  ---------------
  2 s^2 + 3 s + 5
 
Continuous-time transfer function.

bode(G), grid on

●

[Walter Roberson]

@Sam Chak

FIFO stands for First In First Out, which is one of the major queuing strategies.

[Sam Chak]

Thanks @Walter Roberson. What do frequency and magnitude mean in this FIFO queuing context? I can't find the keywords in the Wikipedia and GeeksforGeeks articles. Does continuous input refer to non-discrete events, something is not separated into distinct parts?

Answer 1

[Walter Roberson]

Outline:

Q = [];
while true
    check whether data is present
    if data is present
        new_data = fetch data;
        Q(end:end+numel(new_data)-1) = new_data;
    end
    if ~isempty(Q)
        Head = Q(1);
        Q = Q(2:end);
        do something with Head
    end
end

[Walter Roberson]

The above is suitable for cases where the existence of new data can be probed, or data is sure to come in "soon".

The above is not suitable for cases where the only way to obtain data is to wait around an indefinite time for it to be ready.

The approach for the wait-around case depends upon whether the device supports callbacks triggered when data is fetched.

If the device does not support callbacks, then you are better off moving the fetching of the data into a thread, whether that be through a process pool or a background pool. I am feeling lazy so I will only describe using threads if it is something you turn out to actually need.