Accessing dynamically named tables using a new object in R

Question

I have some sequentially labeled data frames i.e frame_1 frame_2 e.t.c... I would like to access them in a sequential manner possibly using a loop

one way that makes sense to me is to assign the name of the data frame I want to access to an object, then pass that object to a function i.e

varname<-paste("frame_",1,_sep="")

then call my function

function(varname)

But R appears to call the function on a string varname, and not the object with the same name as varname.

Is there way I can do what I want?

Thanks.

@SeñorO I tried that but the extra level of indexation made other tasks harder. — user124123, Oct 20 '14 at 15:04

score 1 · Accepted Answer · answered Oct 20 '14 at 15:03

1

I found out you can parse a string as an R command using a combination of eval and parse, so for instance :

   function( eval( parse(text=paste0("name_",1))) )

In a loop:

for( i in 1:length(holder)){
  function(eval( parse(text=paste0("frame_",i))) )
}

answered Oct 20 '14 at 15:03

user124123

Just found this question/answer while looking for duplicates of a similar question. `eval(parse())` works for this, but is overkill. `get()` is simpler, but as Senor O said in comments using a list is considered best practice. – Gregor Thomas Oct 28 '15 at 15:53

1 Answers1