title: Butterworth filtering and bezier smoothing of a trajectory
body: <p>So i have a dataset that represents x-y-z coordinates of a linear motion. The dataset is noisy and i am trying to extract a smooth trajectory as close as possible to the real trajectory using a bezier curve and fitting each point as a control point of the curve. The results are moderately satisfying so i was wondering whether a pre-filtering with a lowpass butterworth will show any better results.</p>
  
  <p>In general is it useful to combine a smoothing technique like bezier or cubic smoothing splines with low pass filtering?</p>