Nothing
Produces power spectral density estimates through iterative refinement of the optimal number of sinetapers at each frequency. This optimization procedure is based on the method of Riedel and Sidorenko (1995), which minimizes the Mean Square Error (sum of variance and bias) at each frequency, but modified for computational stability. The same procedure can now be used to calculate the cross spectrum.
Package details 


Author  Andrew J. Barbour [aut, cre] (<https://orcid.org/0000000268902452>), Jonathan Kennel [aut] (<https://orcid.org/0000000344746886>), Robert L. Parker [aut] 
Maintainer  Andrew J. Barbour <andy.barbour@gmail.com> 
License  GPL (>= 2) 
Version  2.1.0 
URL  https://github.com/abarbour/psd Barbour and Parker (2014): https://doi.org/10.1016/j.cageo.2013.09.015 Riedel and Sidorenko (1995): https://doi.org/10.1109/78.365298 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.