loess smoothing

[colman77]

Hello,

Wondering if anyone has made/used localized least-squares or localized polynomial regression in Labview? 

I'm porting MTF analysis routines from MathCAD to Labview... I went through every smoothing/regression function known to man when I wrote the routines in MathCAD, and its loess() function was far and away the best for smoothing our MTF graphs.  I haven't been able to find anything similar in Labview... that being said, I'm virtually brand new to it, so I could easily have missed it.

Anyone got a loess function, or alternatives?

[Jorge_Amaral]

hello,

I'have one .vi from the time there I use Labview 7.1.
I don't know if the new version already has this.
See the attached files

[colman77]

Thanks for the response.  Interesting but unfortunately not quite what I was looking for.

I am looking for a routine that will smooth data by performing a set of localized regressions.  It is a powerful tool because it can deal with noise on any frequency by changing the number of points per regression, while still maintaining a close resemblance to the actual data's shape.  As I mentioned, it works far better with the data I've got than least-squares or polynomial regression due to a rather strange shape.

I can make do with polynomial smoothing... I still have a lot of other "features" 🙂 that I need to deal with before I'll work on making my own loess function... but I thought I'd ask and maybe save myself some time down the road