Dear Sir or Madam,
At the University Medical Center Hamburg-Eppendorf, my research group would like to apply your package “signal” in R.
We have collected motion data with a balance board and would like to use the function “butter” to apply a high- and low-pass filter.
However, I was wondering how to convert the desired hertz values into radians in order to use the correct cutoff values.
Can you help us with this?
Many thanks and best regards