[R] Fwd: Extract element of a list based on an index value

[Corey Sparks]

Solved it:


oldest<-unlist(tapply(warmerge$birth.year, warmerge$SibID,function(x) 
ifelse (x==min(x, na.rm=T)|is.na(x)==T,1,0)))




-----
Corey Sparks, PhD
Assistant Professor
Department of Demography and Organization Studies
University of Texas at San Antonio
501 West Durango Blvd
Monterey Building 2.270C
San Antonio, TX 78207
210-458-3166
corey.sparks 'at' utsa.edu
https://rowdyspace.utsa.edu/users/ozd504/www/index.htm
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