How to Count Unique rows in a data frame?

Question

I have a data frame in R which has a lot of duplicate records. I am interested in finding out how many records of each are in this data frame.

For example, I have this data frame:

Fake Name       Fake ID    Fake Status   Fake Program
June             0003         Green        PR1
June             0003         Green        PR1
Television       202          Blue         PR3
Television       202          Green        PR3    
Television       202          Green        PR3
CRT              12           Red          PR0

And from the above I would want to get something that's like similar to below:

Fake Name       Fake ID    Fake Status   Fake Program     COUNT
June             0003         Green        PR1              2
Television       202          Blue         PR3              1
Television       202          Green        PR3              2
CRT              12           Red          PR0              1

Any help would be appreciated. Thank you.

Answer 1

Use group_by_all then count the number of rows with n:

df %>% group_by_all() %>% summarise(COUNT = n())

# A tibble: 4 x 5
# Groups:   Fake.Name, Fake.ID, Fake.Status [?]
#  Fake.Name  Fake.ID Fake.Status Fake.Program COUNT
#  <fct>        <int> <fct>       <fct>        <int>
#1 CRT             12 Red         PR0              1
#2 June             3 Green       PR1              2
#3 Television     202 Blue        PR3              1
#4 Television     202 Green       PR3              2

Or even better as from @Ryan's comment:

df %>% group_by_all %>% count