Tabulation for Vectors

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Description

tabulate takes the integer-valued vector bin and counts the number of times each integer occurs in it.

Usage

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tabulate(bin, nbins = max(1, bin, na.rm = TRUE))

Arguments

bin

a numeric vector (of positive integers), or a factor. Long vectors are supported.

nbins

the number of bins to be used.

Details

tabulate is the workhorse for the table function.

If bin is a factor, its internal integer representation is tabulated.

If the elements of bin are numeric but not integers, they are truncated by as.integer.

Value

An integer vector (without names). There is a bin for each of the values 1, ..., nbins; values outside that range and NAs are (silently) ignored.

On 64-bit platforms bin can have 2^31 or more elements and hence a count could exceed the maximum integer: this is currently an error.

See Also

table, factor.

Examples

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tabulate(c(2,3,5))
tabulate(c(2,3,3,5), nbins = 10)
tabulate(c(-2,0,2,3,3,5))  # -2 and 0 are ignored
tabulate(c(-2,0,2,3,3,5), nbins = 3)
tabulate(factor(letters[1:10]))

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