Extract system state
Value
An array of system state. If your system is ungrouped
(i.e., n_groups = 1
and preserve_group_dimension = FALSE
),
then this has two dimensions (state, particle). If grouped,
this has three dimensions (state, particle, group)
See also
dust_system_set_state()
for setting state and
dust_system_set_state_initial()
for setting state to the
system-specific initial conditions.