cooltools (version 2.4)

smartround: Round a vector of floating-point values while preserving their sum

Description

Rounds the values in a vector up and down, preserving the sum of the vector and minimizing the total rounding error under this condition. An example where this is useful is when rounding a vector of percentages, where the total should add up to 100 percent.

Usage

smartround(x, digits = 0)

Value

Returns a vector of rounded values of the same length as x.

Arguments

x

vector of values

digits

optional non-negative integer specifying the number of digits of the rounded numbers

Author

Danail Obreschkow

Examples

x = runif(5)
x = x/sum(x)*100
print(x)
print(sum(x))
y = smartround(x)
print(y)
print(sum(y))
y2 = smartround(x,2)
print(y2)
print(sum(y2))