new("pdNatural",
...)
or by the generic constructor function pdNatural
.
Frequently the constructor is given a formula only, creating an
uninitialized pdNatural
object which is later assigned a
value. pdNatural
objects are primarily used to represent the
variance-covariance matrix or the precision matrix of random-effects
terms in mixed-effects models.
"pdMat"
, directly.pdMat-class