Re: [Ifeffit] Ifeffit Digest, Vol 170, Issue 19

2017-04-20 Thread Matt Newville
Hi Chris, On Thu, Apr 20, 2017 at 5:02 PM, Christopher Thomas Chantler < chant...@unimelb.edu.au> wrote: > Note that in general any and every smoothing operation reduces the > information content of the data and its ability to reveal structure. > Well, maybe. If one has mu(E) measured every

Re: [Ifeffit] Ifeffit Digest, Vol 170, Issue 19

2017-04-20 Thread Matthew Marcus
Does Athena use a histogramming method for Fourier filtering? That's what I use. The idea is that to grid the data we don't interpolate but take averages over the data appearing within the bin, with interpolation only when there aren't any points within a bin. For those, you have to bridge

Re: [Ifeffit] Ifeffit Digest, Vol 170, Issue 19

2017-04-20 Thread Christopher Thomas Chantler
Note that in general any and every smoothing operation reduces the information content of the data and its ability to reveal structure. Also, many of the smoothing algorithms change the data point values at vertices, so change the data prior to analysis. Hence in general avoid unless you know