TIMESERIES_BOUNDARY is the jSpectral module of jLab.

 TIMESERIES_BOUNDARY  Apply boundary conditions to data before transform.
 
    TIMESERIES_BOUNDARY is a low-level function called by WAVETRANS and
    ANATRANS.
 
    TIMESERIES_BOUNDARY applies periodic, zero-padded, or mirror boundary
    conditions to a time series.  See ANATRANS or WAVETRANS.
 
    This is a low-level function, not meant to be user called by users.
 
    TIMESERIES_BOUNDARY(X,STR,DETRENDSTR) applies boundary conditions 
    specified by STR to time series X.  If DETRENDSTR='detrend', X is first
    detrended.  STR may be 'periodic', 'zeros', 'mirror', or 'reverse':
 
       'periodic' wraps the beginning around to the end, and vice versa
       'zeros'    extends the time series with zeros at both edges
       'mirror'   reflects the time series about the beginning and the end
       'reverse'  is like mirror, but with a change in sign, and a shift
                    to make the time series be continuous at both edges
 
    TIMESERIES_BOUNDARY(X,DIM,STR) applies the boundary conditions
    specified by STR along dimension DIM.  By default, DIM=1.  Note that
    no detrending is possible for DIM not equal to one.  Also, 'reverse'
    only works for the default case of DIM=1.  
 
    Usage: y=timeseries_boundary(x,str,detrendstr);
    __________________________________________________________________
    This is part of JLAB --- type 'help jlab' for more information
    (C) 2011--2015 J.M. Lilly --- type 'help jlab_license' for details