Get the number of activities in a trajectory. `length`

returns the number
of first-level activities (sub-trajectories not included). `get_n_activities`

returns the total number of activities (sub-trajectories included).

# S3 method for trajectory
length(x)
get_n_activities(x)

## Arguments

## Value

Returns a non-negative integer of length 1.

## See also

`[.trajectory`

, `[[.trajectory`

, `join`

.