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rrep

Duplicating values in a column

I have a df:

> df
# A tibble: 3 x 2
   Class word    
   <fct> <chr>   
 1 Y     nature
 2 Y     great
 3 Y     are

I would like to repeat each value in word a specific number of times. For example, I want to repeat it 4 times:

> df
# A tibble: 12 x 2
   Class word    
   <fct> <chr>   
 1 Y     nature
 2 Y     nature
 3 Y     nature     
 4 Y     nature
 5 Y     great
 6 Y     great
 7 Y     great
 8 Y     great
 9 Y     are
10 Y     are
11 Y     are
12 Y     are

How do I do this using rep()?

Solution

  • We can use uncount

    library(tidyr)
library(dplyr)
df %>%
    uncount(4) %>%
    as_tibble

    Or with rep

    df[rep(seq_len(nrow(df)), each = 4),]