1157/how-to-count-the-number-of-elements-with-the-values-in-vector

Consider a vector of numbers:

num <- c(2,13,7,13,51,43,44,76,647,37,367,435, 443,425,314,31,416,16,367,65,44,425)

How can I count the number of times a value 'x' appears in the vector with R?

You have various options to count the number of times a number occurs:

One of them is to use table():

z <- table(num) > z num 2 7 13 16 31 37 43 44 51 65 76 314 367 416 425 435 443 647 1 1 2 1 1 1 1 2 1 1 1 1 2 1 1 1 1 1 1

Then you can subset it, for the number you want the count for:

z[names(z)==367] 367 2

The second option is to convert it into a data.frame

as.data.frame(table(num)) num Freq 1 2 1 2 7 1 3 13 2 4 16 1 ...

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