I have done experiments on a grinding machine and have collected the data of grinding wheel profile (using a laser sensor).
The raw data consists of info on grinding wheel profile, waviness and roughness (because of abrasive grains). I would like to process the collected raw data. I want to filter out the high frequency and low frequency data. (I want to apply a simple band pass filter). One cycle data is about 200,000 data units and i have them in an excel file (csv data) and would like to perform digital filtering.
How do I filter out the waviness data separately and analyze, from this?