demography: coherentfdm – R documentation

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coherentfdm

Coherent functional demographic model for grouped data

Description

Fits a coherent functional model to demographic data as described in Hyndman, Booth & Yasmeen (2012). If two of the series in data are named male and female, then it will use these two groups. Otherwise it will use all available groups.

Usage

coherentfdm(data, order1 = 6, order2 = 6, ...)

Arguments

`data`	demogdata object containing at least two groups.
`order1`	Number of basis functions to fit to the model for the geometric mean.
`order2`	Number of basis functions to fit to the models for each ratio.
`...`	Extra arguments passed to `fdm`.

Value

A list (of class fdmpr) consisting of two objects: product (an fdm object containing a del for the geometric mean of the data) and ratio (a list of fdm objects, being the models for the ratio of each series with the geometric mean).

Author(s)

Rob J Hyndman

References

Hyndman, R.J., Booth, H., and Yasmeen, F. (2012) Coherent mortality forecasting: the product-ratio method with functional time series models. Demography, to appear. http://robjhyndman.com/papers/coherentfdm

Examples

fr.short <- extract.years(fr.sm,1950:2006)
fr.fit <- coherentfdm(fr.short)
summary(fr.fit)
plot(fr.fit$product, components=3)

demography

Forecasting Mortality, Fertility, Migration and Population Data

v1.22

GPL (>= 2)

Authors

Rob J Hyndman with contributions from Heather Booth, Leonie Tickle and John Maindonald.

Initial release