how to use mutate function in r code example

Example 1: r mutate function

# Create the 'month' column
df %>%
  mutate(month = str_sub(birthday,1,2))
 
# Create the 'day' column
df %>%
  mutate(day = str_sub(birthday,3,4))
 
# Create the 'year' column
df %>%
  mutate(year = str_sub(birthday,5))

Example 2: r mutate function

#remove %
students <- students %>% 
  mutate(score=gsub('\\%','',score))