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tfr1
2011 Aug 31
1
looping by grouping variable
...act a state variable, for which, I
want to use the averages, calculated at the state level, and utilize those
averages for another variable. I know this may be confusing, so I'm posting
an example dataset here:
id.tmp1<-as.character(01001:01010)
st<-substr(id,1,1)
cnty<-substr(id,2,5)
tfr10<-rnorn(1:10)
mydata<-cbind(id,st,cnty,tfr10)
print(mydata)
id st cnty tfr10
[1,] "1001" "1" "001" "1.07505442756833"
[2,] "1002" "1" "002" "-0.882434417011687"
[3,] "1003"...