Separating multiple artefacts in a signal

We have a matrix with ones and zeros, the ones represent an artefact. We are now able to detect the starting time and end time of an artefact, however when there are multiple artefacts: we only get the starttime of the first artefact and the endtime of the last artefact.

starttime= t(find(artLoc,1,'first'));
endtime= t(find(artLoc,1,'last')); 

In our matrix (artLoc) the multiple artefacts are detected correctly.

We would like to add some criteria to the code, such as: only if there are >3 ones it can be called an artefact. And there have to be at least 5 zeros between ones to start an new artefact.

Thanks in advance for the help!!

[Walter Roberson]

oddly identical to https://www.mathworks.com/matlabcentral/answers/441610-separating-multiple-artefacts-in-a-signal