std_start: Standard Starting Value
In mmrm: Mixed Models for Repeated Measures
std_start R Documentation
Standard Starting Value
Description
Obtain standard start values.
Usage
std_start(cov_type, n_visits, n_groups, ...)
Arguments
cov_type
(string)
name of the covariance structure.
n_visits
(int)
number of visits.
n_groups
(int)
number of groups.
...
not used.
Details
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.
Value
A numeric vector of starting values.
mmrm documentation built on Oct. 7, 2024, 1:14 a.m.
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| std_start | R Documentation |
Standard Starting Value
Description
Obtain standard start values.
Usage
std_start(cov_type, n_visits, n_groups, ...)
Arguments
cov_type |
( |
n_visits |
( |
n_groups |
( |
... |
not used. |
Details
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.
Value
A numeric vector of starting values.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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