Description Usage Arguments Details Value Author(s) References Examples
Compute the covariance matrix of eta^ for a fractional ARIMA process.
1 |
eta |
parameter vector |
p,q |
integer scalars giving the AR and MA order respectively. |
m |
integer specifying the length of the Riemann sum, with step
size |
delta |
step size for numerical derivative computation. |
builds on calling specARIMA(eta,p,q,m)
the (square) matrix containg covariances up to ...
Jan Beran (principal) and Martin Maechler (fine tuning)
Beran(1984), listing on p.224–225.
1 2 3 |
[,1]
[1,] 0.7163357
[,1] [,2] [,3] [,4] [,5]
[1,] 3.3963350 -2.1019885 -2.4048012 0.1053109 -0.8301053
[2,] -2.1019885 3.5743701 1.0035697 -0.6869983 -1.1009386
[3,] -2.4048012 1.0035697 2.7727059 0.2182855 1.3808039
[4,] 0.1053109 -0.6869983 0.2182855 0.9250799 0.2104931
[5,] -0.8301053 -1.1009386 1.3808039 0.2104931 2.0905384
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