CODEWITHSUNDEEP
r
user1723765
user1723765

Reputation: 6399

Most frequent number in vector

I have a vector a<-replicate(100, round(runif(1)))

I would like to count which is more frequent 0 or 1.

I could use table(a) but is there a more direct way to display the most frequently occurring number?

My problem with table(a):

a is generated several times in the program and the most frequent number is recorded on each iteration. If I use table(a) the first column will have the count of 0s and the 2nd column the count of 1s. Now I use b<-as.vector(table(a)) to directly get the counts and use b[1] as the number of 0s and b[2] as the number of 1s. Now if it happens that there are only 1s or only 0s in the vector then the length of b will be 1 and I will have no idea wether I have 100 1s or 100 0s.

Upvotes: 0

Views: 2045

Answers (2)

Se&#241;or O
Se&#241;or O

Reputation: 17412

Why not just sum(a)? If sum(a) > 50, 1 is more frequent. It's a common technique for boolean values.

Upvotes: 3

tcash21
tcash21

Reputation: 4995

You could store the table in a data.frame and then use which.max

adf<-data.frame(table(a))
adf[which.max(adf$Freq),1]

Upvotes: 0

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