| draw_U | Samples from a Multivariate Normal Distribution |
| eval_marker | Fast Evaluation of Time-varying Marker Mean Term |
| eval_surv_base_fun | Evaluates the Survival Function without a Marker |
| get_gl_rule | Get Gauss–Legendre Quadrature Nodes and Weights |
| get_ns_spline | Faster Pointwise Function than ns |
| sim_joint_data_set | Simulate Individuals from a Joint Survival and Marker Model |
| sim_marker | Simulate a Number of Observed Marker for an Individual |
| surv_func_joint | Evaluates the Conditional Survival Function Given the Random Effects |