Biological Sciences : 120
Date & Time
March 5, 2014, 11:00 am – 12:00 pm
|Session Chair||Andrew Raim|
- Filtering in the Frequency Domain with Seasonal Adjustment Applications
- I begin by showing how to examine and decompose time series data, moving on to demonstrate difficulties in seeing patterns in the traditional time domain. After a quick background on what the Frequency domain is, I demonstrate how transforming data into this domain can be a natural way to illuminate periodic variations in datasets. With some simple examples I introduce some basic filters. By examining monthly data, where we see an increase in retail numbers in the months before christmas, I demonstrate an obvious peak in the frequency domain and show how a filter can mitigate this effect. Other interesting examples include a musical mixing board or the equalizer in itunes.