Selecting the highest value from a stream of five different channels and determining its source

    wbreidi
    Jul 16 2017 | 9:25 am
    Hello, I need to detect the highest value coming in from different sensors which I can do, but then I have to know where this value came from in order to know where to send it to. I am using the Axion Muse headband and receiving simultaneously five different values for the five different brainwaves, delta, theta, alpha, beta, and gamma. By comparing their values I can tell which value is the highest but my problem is then how to determine to which brainwave the result belongs? For example I can compare two numbers like that: [if $f1 > $f2 then $f1 else $f2], then two other numbers, and then the last two results to get the highest value, but in the process I don't know anymore to which brainwave the result belongs ? Any suggestions?
    • Pedro Santos
      Jul 16 2017 | 9:58 am
      I would pack the incoming data and use zl.sort. It gives you the sorted list on the left output and the index order on the right output.
    • Roman Thilenius
      Jul 16 2017 | 1:05 pm
      for only five it is tempting to use expr...
      ( (($f1>f2)&& ($f1>f3)&& ($f1>f4)&& ($f1>f5)*1 ) + ( ((f2>$f1)&& .... )*2 ) + ...
    • wbreidi
      Jul 16 2017 | 2:41 pm
      Thanks a lot Pedro, your patch is the solution. Now I can route the sensors to where I want them to go. Cheers
    • wbreidi
      Jul 16 2017 | 3:20 pm
      @ Roman, thanks for your reply, but the syntax is long and I get error message "args truncated".
    • Roman Thilenius
      Jul 16 2017 | 9:29 pm
      hrhr, yes that can be that it gets too long already