Hi, thanks Tony, I've been toying with an idea of an *massive* data logger for testing out some filters I've created. (recent question for 1d wavelet denoising) They have heaps of tweaking parameters and it's quite easy to fool oneself with continous tweaking for *one* data set, hence the need for longer and more varied data sets. Enough ramblings, thanks, /Tony -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads