Decimate vi in labview

[BSharmi]

Hi,

I want to use the decimation function in Labview. I looked into this vi - 

http://zone.ni.com/reference/en-XX/help/371361H-01/lvanls/decimatecont/

This vi takes the input data and decimation factor and the output is the decimated array. But don't we  need an anti-aliasing filter before the decimation operation? Does the vi have a filter inside it?

Can anyone please help me?

Thanks!

[Henrik_Volkers]

You can choose the decimation method: pick or mean, (or if you use the resample vis more sophisticated filter)

Guess what the mean will do 😉

[BSharmi]

Thank so much for the reply but I still don't understand exactly what it is doing.

If averaging is false, then the new samples of the decimated array are multiplied by the decimation factor 

if averaging is true, then the new samples of the decimated array are averaged by the decimation factor, but why every time there is the summation of k values for each i.

I am sorry if I sound confusing 😞

Thanks