mirror of
https://github.com/agdamsbo/daDoctoR.git
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63 lines
1.7 KiB
R
63 lines
1.7 KiB
R
#' Extracting date of birth from CPR
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#'
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#' For easy calculation.
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#' @param cpr cpr-numbers in format ddmmyy-xxxx.
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#' @keywords cpr
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#' @export
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#' @examples
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#' dob_extract_cpr("231045-0637")
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dob_extract_cpr<-function(cpr)
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## Input as cpr-numbers in format ddmmyy-xxxx
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## Build upon data from this document: https://cpr.dk/media/167692/personnummeret%20i%20cpr.pdf
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## example vector: fsd<-c("010190-2000", "010115-4000", "010189-6000","010189-3000","010150-6000","010150-4000")
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{
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if (any(substr(cpr,7,7)%in%c(0:9))){stop("Input format should be ddmmyy-xxxx")} # test if input is ddmmyyxxxx
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else {
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dobs<-c()
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a00<-as.numeric(c(0:99))
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a36<-as.numeric(c(0:36))
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a57<-as.numeric(c(0:57))
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b00<-as.numeric(c(0,1,2,3))
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b36<-as.numeric(c(4,9))
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b57<-as.numeric(c(5,6,7,8))
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for (x in cpr)
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{
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p56<-as.numeric(substr(x,5,6))
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p8<-as.numeric(substr(x,8,8))
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birth<-as.Date(substr(x,1,6),format="%d%m%y")
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if (((p56%in%a00)&&(p8%in%b00)))
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{
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dob<-as.Date(format(birth, format="19%y%m%d"), format="%Y%m%d")
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}
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else if (((p56%in%a36)&&(p8%in%b36)))
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{
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dob<-as.Date(format(birth, format="20%y%m%d"), format="%Y%m%d")
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}
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else if ((!(p56%in%a36)&&(p8%in%b36)))
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{
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dob<-as.Date(format(birth, format="19%y%m%d"), format="%Y%m%d")
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}
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else if (((p56%in%a57)&&(p8%in%b57)))
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{
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dob<-as.Date(format(birth, format="20%y%m%d"), format="%Y%m%d")
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}
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else if ((!(p56%in%a57)&&(p8%in%b57)))
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{
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dob<-as.Date(format(birth, format="18%y%m%d"), format="%Y%m%d")
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}
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else {print("Input contains data in wrong format") # test if position 5,6 or 8 contains letters as is the case for temporary cpr-numbers
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}
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dobs<-append(dobs,dob)
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}
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return(dobs)
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}
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}
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