On exit: if
${\mathbf{lplab}}\ne 0$, the names associated with the
$p$ parameters in the model.
If
${\mathbf{intcpt}}=\mathrm{Nag\_NoIntercept}$, the labels in
plab are also the labels for the columns of design matrix used in the analysis.
If ${\mathbf{intcpt}}=\mathrm{Nag\_Intercept}$, columns ${\mathbf{plab}}\left[1\right]$ to ${\mathbf{plab}}\left[p-1\right]$ are the corresponding column labels.
If a mean effect is present in ${M}_{S}$, the corresponding label is always in ${\mathbf{plab}}\left[0\right]$.
If
${\mathbf{lplab}}=0$,
plab is not referenced and may be
NULL.
Note: each element of
plab must be a string of length at least
${\mathbf{lenlab}}-1$.