[R] Sprintf to call data frame from environment

Beatriz aguitatierra at hotmail.com
Tue May 24 22:59:42 CEST 2016

In my environment I have a data frame called Samples_1.txt.
 From this data frame I need to get variable V1.  My code doesn't work.
Note: I need to do it in this way because I have the code into a for loop.

sprintf("Samples_%s.txt", 1)$V1

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