nlmixr2auto (version 1.0.0)

base_model: Create a base model code for single-start model search algorithms

Description

Constructs a named numeric vector defining the initial structural and inter-individual variability model configuration used in single-start automated PK model search algorithms.

Usage

base_model(search.space = "ivbase")

Value

For search.space = "ivbase": a named integer vector of length 9 containing:

• no.cmpt - Number of compartments

• eta.km - IIV flag for \(K_m\)

• eta.vc - IIV flag for \(V_c\)

• eta.vp - IIV flag for \(V_p\)

• eta.vp2 - IIV flag for \(V_{p2}\)

• eta.q - IIV flag for \(Q\)

• eta.q2 - IIV flag for \(Q_2\)

• mm - Michaelis–Menten term flag

• mcorr - Correlation flag among ETAs

• rv - Residual error model code

For search.space = "oralbase": a named integer vector of length 11, including all fields above plus:

• eta.ka - IIV flag for \(k_a\) (oral absorption rate constant)

Arguments

search.space

Character, one of "ivbase" or "oralbase". Default is "ivbase".

Author

Zhonghui Huang

Details

Two search spaces are supported: "ivbase" and "oralbase". A user-specified initial model code can be provided via the custom_base argument. The input is validated for numerical type and expected length, and standardized element names are applied before returning. The function is currently used in stepwise selection and tabu search routines, where a single starting model is iteratively updated.

Examples

base_model("ivbase")
base_model("oralbase")