ratetable
.
class
attribute, but the
structure of the object.
is.ratetable(x, verbose=F)
TRUE
and the object is not a ratetable,
then return a character string describing the way(s) in which
x
fails to be a proper ratetable object.
TRUE
if
x
is a ratetable, and
FALSE
or a description if it is not.
Rate tables are used by the
pyears
and
survexp
functions, and normally
contain death rates for some population, categorized by age, sex, or other
variables. They have a fairly rigid structure, and the
verbose
option
can help in creating a new rate table.