[R] parzen-window, tukey window

[Albrecht Kauffmann]

Dear R-user and -programmer,

has one R-package the ability to compute smoothed periodograms of time
series using the Tukey-window and/or the Parzen-window? In the ts- and
tseries-packages I have found only Daniell-smoothers.

With many thanks in advance for any hint

Albrecht Kauffmann
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