How to count unique values in R

Question

Let's say I have:

v = rep(c(1,2, 2, 2), 25)

Now, I want to count the number of times each unique value appears.

the unique() gives the values which are unique but does not the number of unique values

> unique(v)
[1] 1 2

I want something that gives me

length(v[v==1])
[1] 25
length(v[v==2])
[1] 75

How do I achieve this?

Answer 1

You can get the information printed in a table as follows:

Data = rep(c(1,2, 2, 2), 25)

table(Data)
# Data
#  1  2 
# 25 75

## or another presentation of the same data
as.data.frame(table(Data))
#  Data      Freq
#  1         1   25
#  2         2   75

Answer 2

You can try this way,

as.data.frame(v) %>% count(v)