mini.roots {mgcv} | R Documentation |
INTERNAL function to obtain square roots, B[[i]]
, of the penalty matrices S[[i]]
's having as few
columns as possible.
mini.roots(S, off, np, rank = NULL)
S |
a list of penalty matrices, in packed form. |
off |
a vector where the i-th element is the offset for the i-th matrix.
The elements in columns |
np |
total number of parameters. |
rank |
here |
A list of matrix square roots such that S[[i]]=B[[i]]%*%t(B[[i]])
.
Simon N. Wood <simon.wood@r-project.org>.