Is there a way to detect a defined interval of time between boolean states and if true, switch the boolean state within this interval?

I am currently defining machine process cycles from a hydraulic pressure signal. The signal has been cleaned and I have created a simple script to output a Boolean state vector when the certain conditions are met. However, there are unpredictable pressure spikes that evade these Boolean conditions and cause <=5 second gaps between what is known to be a continuous machine process. Is it possible to detect these time gaps and set the Boolean vector to one when the duration of the localised low state is below a threshold, e.g. 5 seconds?

Answer 1

[Jan]

The description is far too complicated. Actually you have a logical vector and want to remove blocks of TRUE (or FLASE?) is they are shorter then n elements (I cannot know, how many elements are meant by "5 seconds"). Then:

With FileExchange: RunLength:

data   = (rand(1, 1e6) < 0.2);   % A logical vector
[B, N] = RunLength(data);
B(B  & N < 50) = false;  % Set TRUE with less than 50 elements to FALSE
B(~B & N < 20) = true;   % Set FALSE with less than 20 elements to TRUE
cleaned = RunLength(B, N);