| Y.dk {demoDK} | R Documentation |
Risk time (person-years) in the Danish population, classified by sex, age, period and date of birth in 1-year classes. This corresponds to triangles in a Lexis diagram.
data(Y.dk)
A data frame with 13860 observations on the following 6 variables.
sexAPCYupper
The risk time is computed from the population size figures in N.dk,
using the formulae devised in B. Carstensen:
"Demography and epidemiology: Age-Period-Cohort models in the computer age",
http://www.pubhealth.ku.dk/bs/publikationer/rr-06-1.pdf/
data(Y.dk)
str(Y.dk)
# Compute mean age, period for the triangles
attach( Y.dk )
age <- A + (1+upper)/3
per <- P + (2-upper)/3
# Plot a Lexis diagram
library( Epi )
Lexis.diagram( age=c(0,10), date=c(1990,2000), coh.grid=TRUE, int=1 )
box()
# Print the person-years for males there
text( per[sex==1], age[sex==1],
formatC( Y[sex==1]/1000, format="f", digits=1 ) )