I hate rownames

rownames.R

R-STABLE> a <- data.frame(a=1:5, b=head(letters, 5))
R-STABLE> a
  a b
1 1 a
2 2 b
3 3 c
4 4 d
5 5 e
R-STABLE> b <- a[c(1,3,5),]
R-STABLE> b
  a b
1 1 a
3 3 c
5 5 e
R-STABLE> str(b)
'data.frame':	3 obs. of  2 variables:
 $ a: int  1 3 5
 $ b: chr  "a" "c" "e"
R-STABLE> rownames(b)
[1] "1" "3" "5"
R-STABLE> dput(b)
structure(list(a = c(1L, 3L, 5L), b = c("a", "c", "e")), .Names = c("a",
"b"), row.names = c(1L, 3L, 5L), class = "data.frame")
R-STABLE> b[2,]
  a b
3 3 c
R-STABLE> b[3,]
  a b
5 5 e
R-STABLE> b["3",]
  a b
3 3 c
R-STABLE> b["2",]
    a    b
NA NA <NA>
R-STABLE>