GetFitHRegL1 {ptest} | R Documentation |
The -2 loglikelihood ratio test statistic, -2LLR, is computed for testing for periodicity under the laplace noises.
GetFitHRegL1(y)
y |
Vector containing the series. |
To compute the likelihood ratio statistic,
a harmonic regression model is fitted by
the maximum likelihood estimations (MLE)
according to the selected model. In particular, the frequency f is found by
the grid search among
En = {j/101 | j=1,…,50 and j/101 ≥ 1/n}.
The MLE is equivalent to
the least absolute estimation.
The computation is completed by the Exterior Point Methods
with theimported function rq.fit.br
from the package quantreg
.
Vector of length 2 containing the -2 loglikelihood ratio test statistic under the laplace noises and the estimated frequency.
Yuanhao Lai
Li, T. H. (2010). A nonlinear method for robust spectral analysis. Signal Processing, IEEE Transactions on, 58(5), 2466-2474.