I have a hypothetical cohort with: lo = 1000 l1 = 900 l2 = 800 ... How to represent this cohort with Lexis.diagram function () .. and how to calculate rates of age-cohort, cohort-period and period-age. Regards, Ane -- View this message in context: http://n4.nabble.com/Lexis-diagram-tp1597111p1597111.html Sent from the R help mailing list archive at Nabble.com.