List the trajectory unit IDs in a model

Returns the unit IDs present in the model's trajectories frame. If no separate trajectories frame is present, falls back to qe_units() because qeviz can use point rows as trajectory states.

Usage

qe_trajectory_units(x)

Arguments

x

A qe_plot object or a ModelData list from qe_model_data() / qe_extract().

Value

A character vector of trajectory unit IDs.