ymous"></script><!-- pkgdown --><link href="../pkgdown.css" rel="stylesheet"><script src="../pkgdown.js"></script><meta property="og:title" content="Run a filter on the data to smooth it out. — filter_data"><meta property="og:description" content="filter_data allows three different options for filtering, a butterworth lowpass filter, a hanning filter, or
a median filter. You can also set the degree of this filter; we recommend a default of 11.
This filters on one pupil, it can be re-run on a second pupil 