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26 lines
665 B
R
26 lines
665 B
R
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#' CPR check
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#'
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#' Checking validity of cpr number
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#' @param x cpr as "ddmmyy-xxxx".
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#' @keywords cpr
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#' @export
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#' @examples
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#' cpr_check()
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cpr_check<-function(x){
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#Check validity of CPR number, format ddmmyy-xxxx
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p1<-as.integer(substr(x,1,1))
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p2<-as.integer(substr(x,2,2))
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p3<-as.integer(substr(x,3,3))
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p4<-as.integer(substr(x,4,4))
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p5<-as.integer(substr(x,5,5))
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p6<-as.integer(substr(x,6,6))
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p7<-as.integer(substr(x,8,8))
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p8<-as.integer(substr(x,9,9))
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p9<-as.integer(substr(x,10,10))
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p10<-as.integer(substr(x,11,11))
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result<-ifelse((p1*4+p2*3+p3*2+p4*7+p5*6+p6*5+p7*4+p8*3+p9*2+p10) %% 11 == 0,"valid","invalid")
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return(result)
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}
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