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| centre | Centres the data or time series. |
| dpss | Compute the Discrete Prolate Spheroidal Sequences |
| dpssToEigenvalues | Compute eigenvalues for the Discrete Prolate Spheroidal Sequences (dpss) |
| plot.mtm | Compute and plot the multitaper spectrum estimate |
| spec.mtm | Compute and plot the multitaper spectrum estimate |
| willamette | Willamette River time series |