I am trying to remove sinusoidal variability from a set of evenly-spaced intensity vs. time data. These data contain periodic events that are separated by a normalized (but sinusoidally variable) baseline. Essentially I need to remove the variability from my ENTIRE data set based on the variability I find in my baseline. How would I go about doing this?

I realize this is likely a duplicate question but I have not found anything that helps me yet. Thanks!

  • 1
    $\begingroup$ This may help mathematica.stackexchange.com/questions/85845/… $\endgroup$ Commented Jun 26, 2015 at 17:03
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    – bbgodfrey
    Commented Jun 26, 2015 at 17:06
  • $\begingroup$ How about a BandstopFilter with the band right near the frequency of the undesirable sinusoid? $\endgroup$
    – bill s
    Commented Jun 26, 2015 at 17:27
  • $\begingroup$ I should have mentioned this before, the variability is due to a linear combination of sine waves at all different frequencies, and I do not know beforehand how many independent frequencies exist. $\endgroup$
    – John
    Commented Jun 26, 2015 at 18:20
  • $\begingroup$ If you can share a sample of your data, you may get better responses :) $\endgroup$ Commented Jun 26, 2015 at 21:31


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