How do I use a macro variable in R? (Similar to %LET in SAS)

Question

How do I assign a macro variable in R?

In SAS, I would use the following code

%LET DEPVAR = sales_ind

PROC REG DATA=mydata;
MODEL &DEPVAR = VAR1         


        

Answer 1

None of them works. The macro variable is invoked with & in SAS but no similar & being used in R although you can use new=as.name("f3") or new=quote(f3) to refer to f3 as shown below.

> test<-data.frame(f1=c(1,2), f2=c("a","b")); test
#   f1 f2
#1  1  a
#2  2  b

> new=as.name("f3"); new; 
#f3
> new=quote(f3); new; 
#f3

> # you still get new rather than f3 as expected
> new<-test$f1; 
> new
#[1] 1 2