Meaning of the data measures



We have developed a small Android app that records data from Muse in CSV format. We have several data in different columns, with names like “deltaAbsolute[0]”, “deltaAbsolute[1]”, “deltaRelative[2]”, etc. Our problem is that we don’t know the meaning of these measures, I mean: if we want to get the delta signal, which of all the lectures should we take in count for this porpouse?

Thank you very much,