How to extract row names from dataframe

Question

I have a dataframe that I have scrambled through matching and ordering. I ask for a position in the dataframe by matching. Now I want to take that position and get the row.names?

tmp<-match(paste(dat$data), finaltable$data);
> tmp
[1]   3  26  32  38 

    data Duplicate Digit6  Digit7
45  21305    137401 137401 2017681
82  21342    137402 137402 2017731
81  21341    137403 137403 2017632
66  21326    137406 137406 2017775
64  21324    137407 137407 2017745
80  21340    137408 137408 2017768

I need a piece of code that outputs the rowname based on the position outputted from tmp?

Answer 1

If we create some sample data with

set.seed(15)
finaltable<-data.frame(
    data=1:10, 
    count=rpois(10,10), 
    row.names=letters[1:10])
dat<-data.frame(
     data=sample(finaltable$data,3), 
     value=runif(3))

And then do the matching

tmp<-match(paste(dat$data), finaltable$data);

we can get the rownames from the finaltable for the matched rows with

rownames(finaltable)[tmp]
# [1] "h" "d" "a"