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I have a spreadsheet of Accelerometer data out of an iPhone and I have calculated the displacement in the three axis. I would like to figure out how to take this info and calculate the frequency, avg. amplitude, and the highest amplitude. Excel has a frequency function but I would like to understand that math, so I could make the phone calculate this.

Thank you for any help.

Don't worry, this isn't home work, I'm an old f*rt.

Thank you for any help.

Don't worry, this isn't home work, I'm an old f*rt.