round2: Round numbers the way you learned in school

In mrdwab/AMsnippets: Useful function "snippets"

Description

The round2 function rounds numbers in the way you probably learned in school, that is, round up to the next number for values of 5 and above.

Usage

  round2(x, digits = 0)

Arguments

x	The number (or vector of numbers) that needs rounding.
digits	The number of decimal places in the output.

Details

To reduce bias in rounding, R's round function uses a "round-to-even" approach. Still, many people are surprised when they find that R's round function will return the same value for round(1.5) and round(2.5). This function uses the rounding approach found in most school lessons and in software like Excel to make the results comparable.

Author(s)

Unknown (see "References")

References

Function originally found in an anonymous comment at the Statistically Significant blog. See http://www.webcitation.org/68djeLBtJ

See Also

round

Examples

input <- seq(from = 0.5, by = 1, length.out = 10)
round(input)
round2(input)
round(input/10, digits = 1)
round2(input/10, digits = 1)

mrdwab/AMsnippets documentation built on May 23, 2019, 7:15 a.m.