approx_demographics {excessmort}

Interpolate demographic data

Description

Interpolate yearly population estimates so that a population estimate is provided for each day of the year. The function 'approx' is used with 'rule = 2' for extrapolation.

Usage

approx_demographics(
  demo,
  first_day,
  last_day,
  by,
  extrapolation.type = c("linear", "constant", "none"),
  ...
)

Arguments

demo

A data frame with the yearly population estimates. Must have a numeric column named year and a numeric column named population.

first_day

First day to interpolate. If missing the first day of the first year in demo is used.

last_day

Last day to interpolate. If missing the last day of the last year in demo is used.

by

Vector of column names to group by, for example different demographic strata. If missing it will extrapolate within each strata. To collapse all strata, define as by = NULL.

extrapolation.type

Type of extrapolation. Either linear, constant, or none. If none is selected the NAs are returned.

...

additional parameters sent to the function 'approx'.

Value

A data frame with dates and population estimates.