Define ggconsort cohorts

Following a call to cohort_start, use cohort_define to construct cohorts from the full source data which are appended to the ggconsort_cohort object.

cohort_define(.data, ...)

Arguments

.data	A ggconsort_cohort object
...	A series of named expressions which define the cohorts

Value

The modified ggconsort_cohort object which now includes additional $data items according to provided cohort definitions