Pass variable name to a function in r

Question

Is it possible to pass just a variable name in a function call and have it utilised as such within the function??

pseudocode:

q<-function(A){
    b<-(w%in%A.2|w%in%A.7)  
    factor(b,levels=c(F,T),labels=c("non-"A,A))}


w<-c(0:10)
e.2<-c(1,2)
e.7<-c(6,7)

what I´d like to do is

q(e)

and have returned

non-e,e,e,non-e,non-e,e,e,non-e,non-e

//M

q<-function(A) {
    a2<-get(paste(a,".2",sep=""))
    a7<-get(paste(a,".7",sep=""))
    b<-(w%in%a2|%in%a7) 
    factor(b,levels=c(F,T),labels=c(paste("non-",a,sep=""),a)) 
}

q("e")

Thx,

M

In fourth line should be b<-(w%in%a2|w%in%a7) or b<-w%in%c(a2,a7). And you use A as argument and a in code. — Marek
– Marek, Commented Jun 1, 2010 at 10:46
This question could be cleaned up. The example code is much too specific to one user’s needs and includes too much irrelevant noise. — randy
– randy, Commented Jun 5, 2022 at 0:10

mdsumner · Accepted Answer · 2010-06-01 10:02:08Z

5

You should probably choose a different name for your function other than "q" - otherwise you'll never be able to finish ;)

answered Jun 1, 2010 at 10:02

mdsumner

29.5k6 gold badges85 silver badges91 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

nico · Accepted Answer · 2010-06-01 09:24:22Z

4

You can use get

For instance

var1 <- get(paste(e, ".2", sep=""))
var2 <- get(paste(e, ".7", sep=""))

EDIT: as Aidan Cully correctly says then you should call your function as q("e") (i.e. with a string)

edited Jun 1, 2010 at 9:24

answered Jun 1, 2010 at 8:57

nico

51.9k17 gold badges92 silver badges118 bronze badges

1 Comment

Aidan Cully Over a year ago

Note also that the OP should call q("e") instead of q(e).

Collectives™ on Stack Overflow

Pass variable name to a function in r

2 Answers 2

Comments

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Linked

Related