Filter out waviness

Hey there,
First of all I’m using LV 8.6.1 so anyone who is willing to help please post modified code for that version. Thanks for that.
Attached you’ll find a VI mend to filter waviness from roughness using a Gaussian filter as mentioned in industry standards.
I’m using a low cut off of 0.8mm and high cut off of 0.025mm, according to the same standards.
My profile has a very pronounced waviness with a pitch of about 1.33mm.
Looking at the filtered data, I’m wondering why the 1.33mm long wave isn’t attenuate more with a low cut off of 0.8mm. What am I doing wrong here?
Another question I have is the “window parameter” of the filter vi.
According to the help this is the standard deviation using a Gaussian window. But the standard deviation of what; my data?
Thanks for any help and or clarification.
Attachments:
FilterWaviness.vi ‏161 KB

Thanks for your efforts on this Michael!
Attached you can find a picture with the transmission characteristic of the filter needed according to ASME & ISO standards.
Does this cover your "which means how many dB of attenuation in the stopband" mention?
The Excel file also shows that I need different setting for StDev & Taps to match the expected transmission characteristic of the filter.
I mean, StDev and Taps are almost ok for a lowpass & highpass filter with a cut off set to 0.8mm but those settings are completely wrong for a highpass filter with a cut off set to 0.25mm.
Does that mean that for each cut off value I need different settings for StDev & taps?
That also means that I can't use bandpass filter right ?!?
Anyone ever tried to filter roughness data according to ASME & ISO standards?
What filter did you use????
Attachments:
GraphTransmissionChar.jpg ‏149 KB
TransmissionChar.xls ‏21 KB

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Maybe I'm oversimplifying things but I would have assumed the same features and functionality as in Mail for OS-X i.e. you can mark any mail received as 'Junk' if the filter hasn't recognised it as such.
Or is Mail in iOS just not that smart?

Thanks, that sounds a reasonable argument although it would be nice to be able to mark/filter directly from the iPhone as I don't always have access to either my Macbook or iCloud when I'm overseas for long periods and the Junk mail just keeps building!?
Wasn't having a 'dig' at Apple or it's developers; am a long term share-holder so I trust you know what you're doing!
Was just trying to work out if it was anything I was doing wrong

Filter out waviness

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