Digital filtering in LTPDA can be performed by a call to the ao/filter method. ao/filter method is a wrapper of the standard MATLAB filter method. Details of the core algorithm can be found in the proper documentation page.
Given an input analysis object (can be a time series or a frequency series object) a_in, digital filtering operation can be easily performed:
a_out = filter(a_in,fobj)
Where fobj is a filter. It can be a MIIR, a MFIR or a FILTERBANK object.
The filter object fobj can be also embedded in a plist
pl = plist('filter', fobj); a_out = filter(a_in,pl)
|Filter banks||Discrete Derivative|