
Re: is it necessary to taper the begin and the end of a time series before fft?
Posted:
May 15, 2014 6:14 AM


On Thursday, May 15, 2014 7:41:08 PM UTC+12, Ha wrote: > Someone told me that if the value of the beginning is quite different from the value of the end of the time series, some unexpected results may rise. > > > > Is it necessary to taper the begin and end to zero when using the builtin fft function of matlab?
Yes. Google this: Gibbs Phenomenon

