how to order alphabetically rows of a data frame?

2018-06-25 07:20:05

This question already has an answer here:

How to sort a dataframe by multiple column(s)? 16 answers

One solution with dplyr :

library(dplyr)
df %>%
  group_by(x) %>%
  arrange(c)

Or as @Akrun mentions in the comments below just

df %>%
  arrange(x,c)

if you are not interested in grouping. Depends on what you want.

Output:

Source: local data frame [5 x 2]
Groups: x

  x c
1 2 A
2 2 D
3 3 B
4 3 C
5 5 E

There is another solution in base R but it will only work if your x column is ordered as is, or if you don't mind changing the order it has:

> df[order(df$x, df$c), , drop = FALSE]
  x c
2 2 A
1 2 D
4 3 B
3 3 C
5 5 E

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