expected_events_single_arm: Expected number of events
In dominicmagirr/expectedevents: Calculate the expected number of events

expected_events_single_arm returns the expected number of events at a given data-cut-off time.

1 2	expected_events_single_arm(dco = 28, recruitment, model, mu = 0, dropouts = FALSE, total_only = TRUE)

`dco`	Time of data cut-off.
`recruitment`	List of recruitment information. Containing Sample size, `n` Recruitment period, `r_period` Recruitment parameter for power model, `k`
`model`	The piecewise hazard model. A list containing the `change_points` and `lambdas`.
`mu`	The dropout rate. Assumed independent to event hazard.
`dropouts`	Is dropout the event of interest? Default is FALSE.
`total_only`	By default, the function returns only the expected number of events. To see more detailed output set `total_only = FALSE`.