Function find_last_dose_time_before 

pub fn find_last_dose_time_before(subject: &Subject, obs_time: f64) -> f64

Find the time of the last dose (bolus or infusion) before a given observation time

Returns the time of the most recent dose event that occurred before obs_time. If no dose exists before the observation time, returns 0.0.

Arguments

• subject - Subject containing dose events
• obs_time - Observation time to find the preceding dose for

Returns

Time of the last dose before obs_time, or 0.0 if none exists

Example

let subject = Subject::builder("patient")
    .bolus(0.0, 100.0, 0)
    .bolus(12.0, 50.0, 0)
    .observation(18.0, 5.0, 0)
    .build();

let last_dose_time = find_last_dose_time_before(&subject, 18.0);
assert_eq!(last_dose_time, 12.0);