structName
an optional character string with a description of
the pdMat class. Default depends on the method function:
"Blocked" for pdBlocked,
"Compound Symmetry" for pdCompSymm, "Diagonal"
for pdDiag, "Multiple of an Identity" for
pdIdent,
"General Positive-Definite, Natural Parametrization"
for pdNatural, "General Positive-Definite"
for pdSymm, and data.class(object) for pdMat.
noCorrelation
an optional logical value indicating whether
correlations are to be printed in print.summary.pdMat. Default
depends on the method function: FALSE for pdDiag and
pdIdent, and TRUE for all other classes.