split array

[madoc]

Trying, serching and reading for hours, but cant get it right: I have a waveform array going over and under zero (lets say as a sound wave). I want to separate the positive waves from the negative ones and select the longest positive to continue calculations (and discard the rest). Please can someone help me? I´ve read a lot but cant split if I don´t know at which point. A bolean IF funtion for one value >0 AND and one <0 maybe? And then the opposite? Any suggestions?

Martin

[NitzZ]

Hi madoc,

You may go through the attached vi to see how it can be done. I have used a sine wave simulator to explain it. 

Regards,

Nitzz

(Give kudos to good Answers and Mark it as a Solution if your problem is Solved;)) 

[altenbach]

Here's a quick draft. It probably needs a few tweaks.

It finds the largest stretch of consecutive non-negative numbers from a 1D array, then takes it as a subset for further prcessing.

(There is also a way to only keep the longest subet, without building the array pf positive subsets first. Try it. ;))

[madoc]

Thanks - I´ll dig into it and be back!

You guys are great! /M

[madoc]

I managed the sorting, but altenbachs isolation of the longest stretch really did it!

Thanks a lot! Martin