nlmixr2auto (version 1.0.0)

omega_block: Generate omega block Code for nlmixr2 model

Description

Generates the code for the omega block matrix in nlmixr2 syntax, supporting both independent variance terms and correlated covariance structures.

Usage

omega_block(param_list, mcorr, eta_table)

Value

A character string containing nlmixr2 omega matrix specification code.

• When mcorr = 0: Returns individual variance terms in formula syntax

• When mcorr = 1: Returns covariance block structure in matrix syntax

Arguments

param_list

A character vector of parameter names requiring inter-individual variability (IIV) terms.

mcorr

Integer flag indicating covariance structure:

• 0: Generate independent variance terms only

• 1: Generate full block covariance structure

eta_table

A data frame containing eta initialization values and correlation coefficients. Must contain columns:

• Name: Parameter names (format "eta.X" for variances, "cor.eta_X_Y" for correlations)

• init: Initialization values for variance/covariance terms

Author

Zhonghui Huang

Examples

# Example eta table structure
eta_table <- initialize_param_table()

# Generate independent terms
omega_block(c("eta.cl", "eta.vc"), mcorr = 0, eta_table)

# Generate covariance block
omega_block(c("eta.cl", "eta.vc"), mcorr = 1, eta_table)