money representation in R

Question

I would like to know how can I work with money with R. It means, do arithmetic, print well formatted numbers and etc.

For example I have some values

1.222.333,37 
1.223.444,88

I could translate it to numeric and round it, removing the cents, but there isn't a better pattern to work with? I did try the format method, something like:

format(141103177058,digits=3,small.interval=3,decimal.mark='.',small.mark=',')

but without success. any tip or ideas?

Answer 1

The scales package has a function for this: dollar_format()

install.packages("scales")
library(scales)

muchoBucks <- 15558.5985121
dollar_format()(muchoBucks)

[1] "$15,558.60"

Answer 2

What about this one:

printCurrency <- function(value, currency.sym="$", digits=2, sep=",", decimal=".") {
  paste(
        currency.sym,
        formatC(value, format = "f", big.mark = sep, digits=digits, decimal.mark=decimal),
        sep=""
  )
}

printCurrency(123123.334)

Answer 3

Suppose we have two specific character values (currency):

s1 <- "1.222.333,37"
s2 <- "1.223.444,88"

First of all we want R to display numeric values with proper number of digits:

# controls representation of numeric values
options(digits=10)

Converting currency to numeric can be implemented like this:

# where s is character
moneyToDouble <- function(s){
  as.double(gsub("[,]", ".", gsub("[.]", "", s)))
}

x <- moneyToDouble(s1) + moneyToDouble(s2)
x    

Printing numeric as currency:

# where x is numeric
printMoney <- function(x){
  format(x, digits=10, nsmall=2, decimal.mark=",", big.mark=".")
}

printMoney(x)