This is a result of how R treats factors.
There's more than one way to do what I think you're asking for.
I've constructed a smaller version of your data frame to illustrate one
quick way if that's all you need:
> smdat<-
> data.frame(V1=c("AB","AB.C","ABF10"),V2=rep("20091224",3),V3=rep(156.0,3))
> smdat
V1 V2 V3
1 AB 20091224 156
2 AB.C 20091224 156
3 ABF10 20091224 156
> smdat[1,][1]
V1
1 AB
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