How to count unique values in R?

0 votes

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?

Apr 9, 2018 in Data Analytics by DataKing99
• 8,100 points
667 views

1 answer to this question.

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0 votes

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
answered Apr 9, 2018 by darklord
• 6,140 points

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