Data sorting and logical expressions

Hi!

I have a speed vector from a vehicle where i want to identify the stops and how long they are. I managed to create several logic vectors which save the position (index) or mark the index as "0" else "1". However, the logic vector I went with is one which save the vector index if the speed is zero or very close to. Resulting if there´s a longer stop, the index count will be something such as [0;0;0;33;34;35;...;99;100;101;0;0;0]. And I want to use this. So I try to create a final logic which tracks this pattern and calculate the total stop time. I can do that since I know that every data point has the sample 1 [Hz]. Other knowledge is that it data starts and end with a stop.

My logic was, which didn´t work (it runs but gives back unexpected result, nothing useful), the following:

for i = 1:length(index)-1
    for j = 2:length(index)

        if index(i) > 0 && index(j) > 0 
            stop_start(i,1) = index(i);
            
        elseif index(i) > 0 && index(j) == 0 
            stop_end(i,1) = index(i);
        end
        
    end
end
stop_time_tot = stop_start - stop_end;

Any ideas on what went wrong? I usually end up like this on ohter similar data sorting problems but never take it further but I want to get better and increase my knowledge...

All the best, Adam.

[Asher]

answering myself if anyone reading this!

It was not possible doing in this way, because the loop didn´t behave as expected, the for loops jumps, of course, one on one, not both together as my intention was... I forgot how for loops works basically! So they are not suited for this task! Instead I used the command >> "find", and some more lines to sort it out!

No probs!

//Adam