vtPriorPar | R Documentation |
Get prior distribution parameters for partially parametric or partially parametric+ models
vtPriorPar(prior.y = NULL, tau = NULL, sdalpha = 10, sdrho = 10,
vtheta = NULL)
prior.y |
Historical data for generating prior parameters. It has the
same structure as |
tau |
Vector of |
sdalpha |
|
sdrho |
|
vtheta |
Additional variance term for eliciting prior parameters from
|
The priors are specified as q^{(l)} \sim Beta(a_q^{(l)}, b_q^{(l)})
,
and \log\rho^{(l)} \sim N(0, \sigma_\rho^2)
.
A VTPRIOR
list with
TAU:vector of \tau
's for each level
ABCD:A matrix of 4 columns: a_q
, b_q
, a_\rho
,
{\sigma_\rho}
. Each row represents a dose level.
par.prior <- vtPriorPar(tau = c(0.2, 0.4, 0.6), sdalpha = 10);
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