Shrinkage of the covariance matrix according to Schäfer and Strimmer (2005).
shrink_estim(x, minT = T)A list with two objects: the first ($scov) is the shrunk covariance matrix
and the second ($lambda) is the shrinkage intensity coefficient.
residual matrix
this param allows to calculate the covariance matrix according
to the original hts formulation (TRUE) or according to the standard
approach (FALSE).
This function is a modified version of the shrink_estim() hidden function of hts.
Schäfer, J.L., Strimmer, K. (2005), A Shrinkage Approach to Large-Scale Covariance Matrix Estimation and Implications for Functional Genomics, Statistical Applications in Genetics and Molecular Biology, 4, 1
Hyndman, R. J., Lee, A., Wang, E., and Wickramasuriya, S. (2020). hts: Hierarchical and Grouped Time Series, R package version 6.0.1, https://CRAN.R-project.org/package=hts.
Other utilities:
Cmatrix(),
FoReco2ts(),
agg_ts(),
arrange_hres(),
commat(),
ctf_tools(),
hts_tools(),
lcmat(),
oct_bounds(),
residuals_matrix(),
score_index(),
thf_tools()