ships {MASS} | R Documentation |
Data frame giving the number of damage incidents and aggregate months of service by ship type, year of construction, and period of operation.
ships
type
type: "A"
to "E"
.
year
year of construction: 1960–64, 65–69, 70–74, 75–79
(coded as "60"
, "65"
, "70"
, "75"
).
period
period of operation : 1960–74, 75–79.
service
aggregate months of service.
incidents
number of damage incidents.
P. McCullagh and J. A. Nelder, (1983), Generalized Linear Models. Chapman & Hall, section 6.3.2, page 137