[R] Issue using tapply

[Ista Zahn]

I think the problem is that there is no value for RST in Emp.Et.Em.

-Ista

On Mon, Jan 25, 2010 at 6:57 PM, LCOG1 <jroll at lcog.org> wrote:
>
> Hello all,
>   I am trying to use the tapply function to sum some values and change the
> column names of the resulting vector.
>
> I input
>     Emp  Et
> 1  10565 ACC
> 2   7515 ADM
> 3    625 AGF
> 4   6243 CNS
> 5  12721 EDU
> 6   3924 FIN
> 7  18140 HLH
> 8   3686 INF
> 9  15841 MFG
> 10   243 MIN
> 11  1864 MNG
> 12  4664 OSV
> 13  5496 PRF
> 14  4988 PUB
> 15  2166 REC
> 16  2153 REL
> 17 16082 RTL
> 18  3582 TRN
> 19   757 UTL
> 20  5818 WHL
>
> and i want to aggregate certain types based on the following matches
>
>    Et     Em
> 1  AGF AFREMP
> 2  MIN MINEMP
> 3  UTL TCPEMP
> 4  CNS CONEMP
> 5  MFG MFGEMP
> 6  WHL WSTEMP
> 7  RTL RETEMP
> 8  TRN TCPEMP
> 9  INF SVCEMP
> 10 FIN FINEMP
> 11 REL FINEMP
> 12 PRF SVCEMP
> 13 MNG FINEMP
> 14 ADM SVCEMP
> 15 EDU SVCEMP
> 16 HLH SVCEMP
> 17 REC SVCEMP
> 18 ACC SVCEMP
> 19 RST SVCEMP
> 20 OSV SVCEMP
> 21 PUB GVTEMP
>
> but the last value in my result is NA when it should be 5818. so my actual
> result is
> AFREMP CONEMP FINEMP GVTEMP MFGEMP MINEMP RETEMP SVCEMP TCPEMP WSTEMP
>   625       6243     7941      4988    15841     243    3582     81035
> 6575     NA
>
> I have rechecks to make sure there isnt a simple labeling error but i havent
> found anything.  Below is test code.
>
> Et<-c("AGF","MIN","UTL","CNS","MFG","WHL","RTL","TRN","INF","FIN","REL",
> "PRF","MNG","ADM","EDU","HLH","REC","ACC","RST","OSV","PUB")
>
> Em<-c("AFREMP","MINEMP","TCPEMP","CONEMP","MFGEMP","WSTEMP","RETEMP","TCPEMP",
> "SVCEMP","FINEMP","FINEMP","SVCEMP","FINEMP","SVCEMP","SVCEMP","SVCEMP","SVCEMP",
> "SVCEMP","SVCEMP","SVCEMP","GVTEMP")
>
> EtToEm..<-data.frame(Et,Em)
>
> Emp<-c(10565,7515,625,6243,12721,3924,18140,3686,15841,243,1864,4664,5496,4988
> ,2166,2153,16082,3582,757,5818)
>
> Et.t<-c("ACC","ADM","AGF","CNS","EDU","FIN","HLH","INF","MFG","MIN"
> ,"MNG","OSV"
> ,"PRF","PUB","REC","REL","RTL","TRN","UTL","WHL")
>
> Emp.Et<-data.frame(Emp,Et.t)
> names(Emp.Et)[2]<-"Et"
>
> Emp.Et.Em<-as.vector(Emp.Et$Em)
> names(Emp.Et.Em) <- Emp.Et$Et
>
> EmpEt.Em <- tapply(Emp.Et.Em[EtToEm..$Et], EtToEm..$Em, sum)
>
> --
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>
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>



-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org