Changelog

Change default value for include_tafd to FALSE (#29)
Add option lastdose.include_tafd (#29)
Add option lastdose.id_col (#27)
Add option lastdose.time_units (#27)
Search column names for candidate ID columns using find_id_col(); this function is unexported (#25)
Search column names for candidate time columns using find_time_col(); this function is unexported (#25)
Handle missing values (NA) in the time column; these records will stay in place and NA will be inserted for all outputs (#30)

Fix bug where II column was not properly detected resulting in incorrect TAD calculation when doses were also scheduled via ADDL #21
Append TAFD (time after first dose) to data data frame on lastdose() and lastdose_df() call and add tafd to return from lastdose_list() #19

Add time_col and id_col arguments to let user name columns containing time and user id information #14
ID column is allowed to be character; data will be converted to numeric if it is character #14
Time column is allowed to be POSIXct; data will be converted to numeric according to value of time_units argument #9

Commented records are not considered when looking for doses in the data set, but TAD and LDOS are filled like any other observation record (relative to the last non-commented dose) (#9)

lastdose 0.4.0