How to replace numbers with text in R

I am new to using R and I am encountering a really annoying roadblock.

I am trying to use a dataset and convert all 0's to a value of "Not_Eaten' and all 1's to a value of Eaten.

I am using this statement

attach(data)
Eaten <- ifelse(Eaten==0, "Not_Eaten",'Eaten')

but the datasheet does not update and the Eaten column is still populated with 0's and 1's.

Can someone please point out what I am doing wrong here?

If it helps, the class is integer and not numeric for some reason.