Combine two demogdata objects into one demogdata object

Function to combine demogdata objects containing different years but the same age structure into one demogdata object. The standard use for this function will be combining historical data with forecasts. The objects must be of the same type.

Usage

combine.demogdata(obj1, obj2)

Arguments

obj1: First demogdata object (e.g., historical data).
obj2: Second demogdata object (e.g., forecasts).

Value

Object of class “demogdata” with the following components:

year: Vector of years
age: Vector of ages
rate: Matrix of rates with with one age group per row and one column per year.
pop: Matrix of populations in same form as rate and containing population numbers. This is only produced when both objects contain a pop component.
type: Type of object: “mortality”, “fertility” or “migration”.
label: Name of area from which the data are taken.

Author

Rob J Hyndman

Examples

fit <- fdm(fr.mort)
fcast <- forecast(fit, h=50)
france2 <- combine.demogdata(fr.mort,fcast)
plot(france2)

plot(life.expectancy(france2))
#> Warning: No population data available for combining upper ages
lines(rep(max(fr.mort$year)+0.5,2),c(0,100),lty=3)