spec.taper               package:stats               R Documentation

Taper a Time Series by a Cosine Bell

Description:

     Apply a cosine-bell taper to a time series.

Usage:

     spec.taper(x, p=0.1)

Arguments:

       x: A univariate or multivariate time series

       p: The total proportion to be tapered, either a scalar or a
          vector of the length of the number of series.

Details:

     The cosine-bell taper is applied to the first and last 'p[i]/2'
     observations of time series 'x[, i]'.

Value:

     A new time series object.

Note:

     From package 'MASS'.

Author(s):

     Kurt Hornik, B.D. Ripley

See Also:

     'spec.pgram', 'cpgram'

