README.md

In mrc-ide/beers: Calculate Beers Ordinary Interpolation

beers

Introduction

The beers package provides the Beers ordinary and modified methods for interpolating between 5-yearly points, and subdividing 5-yearly agebands. The most likely usage is with demographic data that has been presented at 5-yearly intervals, or in 5-yearly age-bands. The Beers algorithm can be used to interpolate, or subdivide those data respectively, and is notably used by UNWPP for that purpose.

Usage

Four functions provide interpolation or subdivision, with the ordinary or modified Beers method. For interpolation, the algorithm requires at least 6 points, and for subdivision at least 5 points.

beers_int_ordinary(c(1, 2, 4, 8, 16, 32))
#>  [1]  1.0000  1.1061  1.2696  1.4780  1.7229  2.0000  2.3092  2.6545  3.0437
#> [10]  3.4879  4.0000  4.5931  5.2791  6.0681  6.9701  8.0000  9.1793 10.5355
#> [19] 12.1007 13.9100 16.0000 18.4083 21.1732 24.3336 27.9291 32.0000
beers_int_modified(c(1, 2, 4, 8, 16, 32))
#>  [1]  1.0000  1.1672  1.3435  1.5362  1.7526  2.0000  2.2856  2.6165  3.0003
#> [10]  3.4445  3.9570  4.5464  5.2227  5.9982  6.8887  7.9140  9.0979 10.4676
#> [19] 12.0529 13.8859 16.0000 18.4296 21.2095 24.3746 27.9598 32.0000
beers_sub_ordinary(c(10, 20, 40, 80, 160))
#>  [1]  1.061  1.635  2.084  2.449  2.771  3.092  3.453  3.892  4.442  5.121
#> [11]  5.931  6.860  7.890  9.020 10.299 11.793 13.562 15.652 18.093 20.900
#> [21] 24.083 27.649 31.604 35.955 40.709
beers_sub_modified(c(10, 20, 40, 80, 160))
#>  [1]  1.672  1.763  1.927  2.164  2.474  2.856  3.309  3.838  4.442  5.125
#> [11]  5.894  6.763  7.755  8.905 10.253 11.839 13.697 15.853 18.330 21.141
#> [21] 24.296 27.799 31.651 35.852 40.402

Installation

You can install beers from github with:

# install.packages("devtools")
devtools::install_github("mrc-ide/beers")

License

MIT + file LICENSE © Wes Hinsley.

mrc-ide/beers documentation built on Dec. 10, 2020, 12:10 a.m.