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I know head() and tail() function will return the first or last parts of a dataset, but I wanna know if the two functions are gonna order the output, or just return without ordering them? Thanks many in advance!

Chris
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1 Answers1

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As you can see below, they do keep the original order:

df <- data.frame(number = 1:26, letter = letters[1:26])

> head(df)
  number letter
1      1      a
2      2      b
3      3      c
4      4      d
5      5      e
6      6      f

> tail(df)
   number letter
21     21      u
22     22      v
23     23      w
24     24      x
25     25      y
26     26      z
broti
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  • OK. I use this method and have a try. The two functions won't change the order. But actually I think your examples here are not so reasonable cuz df here is an orderly data frame itself. Thank you so much! – Chris Mar 26 '20 at 15:37