Creates a SubjectTag. This value uniquely identifies subjects, when both generations are included in the same dataset.

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Description

A SubjectTag uniquely identify subjects. For Gen2 subjects, the SubjectTag is identical to their CID (ie, C00001.00 -the SubjectID assigned in the NLSY79-Children files). However for Gen1 subjects, the SubjectTag is their CaseID (ie, R00001.00), with "00" appended. This manipulation is necessary to identify subjects uniquely in inter-generational datasets. A Gen1 subject with an ID of 43 becomes 4300. The SubjectTags of her four children remain 4301, 4302, 4303, and 4304.

Usage

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CreateSubjectTag(subjectID, generation)

Arguments

subjectID

The ID assigned by the NLSY. For Gen1 subjects, this will be their CaseID (ie, R00001.00). For Gen2 subjects, this will be their CID (ie, C00001.00).

generation

The generation of the subject. Values are either 1 or 2, representing Gen1 and Gen2.

Details

For a fuller explanation of SubjectTag in context, see the Links79Pair dataset documentation.

Value

A integer value under normal circumstances. An error is thrown if the vectors subjectID and generation are different lengths. If either input vector has NA values, the respective output element(s) will be NA too.

Author(s)

Will Beasley

See Also

Links79Pair

Examples

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library(NlsyLinks) #Load the package into the current R session.
  
#Typically these two vectors will come from a data frame.
subjectIDs <- c(71:82, 10001:10012)
generation <- c(rep(1, 12), rep(2, 12))
  
CreateSubjectTag(subjectIDs, generation)
#Returns 7100, ..., 8200, 10001, ..., 10012
  
#Use the ExtraOutcomes79 dataset, with numeric variables 'SubjectID' and 'Generation'.
ExtraOutcomes79$SubjectTag <- CreateSubjectTag(
   subjectID=ExtraOutcomes79$SubjectID, 
   generation=ExtraOutcomes79$Generation
)

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