modify_StParmCustom: Modify custom structural parameter in PML spaces

Description

Modify custom structural parameter in PML spaces

Usage

modify_StParmCustom(
  PMLParametersSets,
  StParmName,
  Type,
  State,
  ThetaStParm,
  OmegaStParm,
  Covariates,
  PMLStructures = NULL
)

Value

An updated list of PML models (PMLModels class instance) matching the specified options.

Arguments

PMLParametersSets

A list of PML parameters sets (PMLModels class instance).

StParmName

Character specifying the name of the structural parameter to be added.

Type

Character specifying the type of the structural parameter. Options are

LogNormal The PML statement of the structural parameter will look like the following:

stparm(V = tvV * wt^dVdwt * exp(nV + nVx0*(Occasion==0) + nVx1*(Occasion==1)))

LogNormal1 The PML statement of the structural parameter will look like the following:

stparm(V = (tvV + wt*dVdwt) * exp(nV + nVx0*( Occasion==0) + nVx1*( Occasion==1)))

LogNormal2 The PML statement of the structural parameter will look like the following:

stparm(V = exp(tvV + wt*dVdwt + nV + nVx0*(Occasion==0) + nVx1*(Occason==1)))

LogitNormal The PML statement of the structural parameter will look like the following:

stparm(V = ilogit(tvV + wt*dVdwt + nV + nVx0*(Occasion==0) + nVx1*(Occasion==1)))

Normal The PML statement of the structural parameter will look like the following:

stparm(V = tvV + wt*dVdwt + nV + nVx0*(Occasion==0) + nVx1*(Occasion==1))

State

character string that indicates the presence of the structural parameter. Options are:

None The structural parameter does not exist in the specified PMLStructures.
Present The structural parameter exists in the specified PMLStructures (the default).
Searched The presence of the structural parameter is searched.

ThetaStParm

A Theta class instance inside the structural parameter. If not given, the associated Theta will be automatically created with its name set to "tv" + StParmName.

OmegaStParm

An Omega class instance inside the structural parameter. If not given, the associated Omega will be automatically created with its name set to "n" + StParmName

Covariates

A list of covariates (Covariate instances) that should be included in the structural parameter statement.

PMLStructures

Character or character vector specifying names of PML structures to whichthe structural parameter will be added. For the naming convention of PMLStructures, see Details section of get_PMLParametersSets().

Details

This function can be applied to the custom models. It allows modification of custom structural parameters defined in the PML code of these spaces.

When modifying a custom structural parameter, the corresponding stparm statement is removed from the PML code, and the updated parameter is added back as a StParm class using the provided arguments. Similarly, associated fixef and ranef statements related to the custom structural parameter are removed.

Please note that this function is specifically designed for modifying custom structural parameters. For non-custom parameters, use modify_StParm().

Examples

Run this code


# Modify the custom structural parameter 'Cl':
OneCpt_CustomCode <-
  paste0(
    "\nderiv(A1 = - Cl * C)",
    "\ndosepoint(A1)",
    "\ndosepoint2(A1, tlag = 12)",
    "\nC = A1 / V",
    "\nerror(CEps = 0.01)",
    "\nobserve(CObs = C + CEps * sqrt(1 + C^2 * (CMultStdev/sigma())^2), bql = 0.01)",
    "\nstparm(V = tvV * exp(nV))",
    "\nstparm(Cl = tvCl * exp(nCl))",
    "\nstparm(CMultStdev = tvCMultStdev)",
    "\nfixef(tvV = c(, 5, ))",
    "\nfixef(tvCl = c(, 1, ))",
    "\nfixef(tvCMultStdev = c(, 0.1, ))",
    "\nranef(diag(nV) = c(1))",
    "\nranef(diag(nCl) = c(1))\n"
  )

OneCpt_CustomCode <-
 modify_StParmCustom(
   create_CustomSpace(OneCpt_CustomCode),
                      StParmName = "Cl",
                      Type = "Normal")