Can rely on the signal R package, which again implements the filtering functions from Matlab (I remember having used the filtfilt and butterworth before, they're common in human motor work, so maybe include them too as options). Also see the trajr package for their straightforward implementation of the Savitsky-Golay filter - check to be sure that the default values hold up (https://github.com/JimMcL/trajr/blob/c1d2005f03cc4f17e6cc277371ab26de1bf2bd8d/R/trajectory.R#L372).
Can rely on the
signalR package, which again implements the filtering functions from Matlab (I remember having used thefiltfiltandbutterworthbefore, they're common in human motor work, so maybe include them too as options). Also see thetrajrpackage for their straightforward implementation of the Savitsky-Golay filter - check to be sure that the default values hold up (https://github.com/JimMcL/trajr/blob/c1d2005f03cc4f17e6cc277371ab26de1bf2bd8d/R/trajectory.R#L372).