I have a Data frame is like:
account  data
a        10
b        20
c        30
a        40
b        50
c        60
a        70
output:
#account  data
#a        10
#a        40
#a        70
#b        20
#b        50
#c        30
#c        60
I have tried with group_by and arrange, but not it is working
 
    