R help - Jun 2013 - assigning global columns selection for all subset functions in script

How do I let R know that I always want to select the same columns in my
subset functions (below), so that I don't have to keep copy/pasting the same
selection? (thanks)
	devUni2 <- subset(devUni1, dind02 != 52,
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
	devUni3 <- subset(devUni2, lfsr94 == 1 | lfsr94 == 2 ,
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
	devUni4 <- subset(devUni3, class94 < 6 ,
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
	devUni5 <- subset(devUni4, relref95 < 10 | relref95 ==13 | relref95
>=14,
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))



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On Jun 11, 2013, at 9:18 AM, bcrombie wrote:
> How do I let R know that I always want to select the same columns in my
> subset functions (below), so that I don't have to keep copy/pasting the
same
> selection? (thanks)
> 	devUni2 <- subset(devUni1, dind02 != 52,
>
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
Perhaps: 

	devUni3 <- subset(devUni2, lfsr94 == 1 | lfsr94 == 2 ,
select=names(devUni2) )

Or just create a character vector:

desired <- names(devUni2)
devUni3 <- subset(devUni2, lfsr94 == 1 | lfsr94 == 2 , select=desired )

Because I am lazy I exprimented a bit to avoid adding all those quote marks:

desired <- expression(paidhre, earnhre,earnwke,uhourse,hourslw,otc,ind02,
dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year)

as.character(as.list(desired))
 [1] "paidhre"  "earnhre"  "earnwke" 
"uhourse"  "hourslw"  "otc"      "ind02"
 [8] "dind02"   "occ00"    "docc00"  
"lfsr94"   "class94"  "relref95"
"smsastat"
[15] "state"    "weight"   "year"    
> 	devUni4 <- subset(devUni3, class94 < 6 ,
>
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
> 	devUni5 <- subset(devUni4, relref95 < 10 | relref95 ==13 | relref95
>=14,
>
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
> 
-- 

David Winsemius
Alameda, CA, USA

index the columns to select 
lets say you want to select a set of colmns 2,4,6,8
Try something like this. (not run)
mycols  <-  c(2,4,6,8)
select(mydata[ , mycols] , mdata$x == 3)
John Kane
Kingston ON Canada

> -----Original Message-----
> From: bcrombie at utk.edu
> Sent: Tue, 11 Jun 2013 09:18:25 -0700 (PDT)
> To: r-help at r-project.org
> Subject: [R] assigning global columns selection for all subset functions
> in script
> 
> How do I let R know that I always want to select the same columns in my
> subset functions (below), so that I don't have to keep copy/pasting the
> same
> selection? (thanks)
> 	devUni2 <- subset(devUni1, dind02 != 52,
>
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
> 	devUni3 <- subset(devUni2, lfsr94 == 1 | lfsr94 == 2 ,
>
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
> 	devUni4 <- subset(devUni3, class94 < 6 ,
>
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
> 	devUni5 <- subset(devUni4, relref95 < 10 | relref95 ==13 | relref95
> >=14,
>
select=c(paidhre,earnhre,earnwke,uhourse,hourslw,otc,ind02,dind02,occ00,docc00,lfsr94,class94,relref95,smsastat,state,weight,year))
> 
> 
> 
> --
> View this message in context:
>
http://r.789695.n4.nabble.com/assigning-global-columns-selection-for-all-subset-functions-in-script-tp4669252.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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