std_start | R Documentation |
Obtain standard start values.
std_start(cov_type, n_visits, n_groups, ...)
cov_type |
( |
n_visits |
( |
n_groups |
( |
... |
not used. |
std_start
will try to provide variance parameter from identity matrix.
However, for ar1
and ar1h
the corresponding values are not ideal because the
\rho
is usually a positive number thus using 0 as starting value can lead to
incorrect optimization result, and we use 0.5 as the initial value of \rho
.
A numeric vector of starting values.
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