spec.taper {ts} | 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`