Returns the recruitment time for each subject
Returns the recruitment time for each subject
get.recruitment.time( x, to.numeric = TRUE, wave.fallback = FALSE, check.type = TRUE )
x |
the rds.data.frame |
to.numeric |
if true, time will be converted into a numeric variable. |
wave.fallback |
if true, subjects' recruitment times are ordered by wave and then by data.frame index if no recruitment time variable is available. |
check.type |
if true, x is required to be of type rds.data.frame |
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.