R function to deal with sprintf("%.2f", ...) returning -0.00

sprintf_fix.R

# a function to deal with sprintf("%.2f", ...) returning -0.00
# see https://twitter.com/hspter/status/314858331598626816

f <- function(..., dig=2) {
  g <- sprintf(paste0("%.", dig, "f"), ...)
  z <- paste0("0.", paste(rep("0", dig), collapse=""))
  g[g==paste0("-",z)] <- z
  g
}

# this should return c("0.000", "0.000", "0.500", "-0.500", "-0.002")
f(c(-0.0002, 0.0002, 0.5, -0.5, -0.002), dig=3)

This worked like a charm. Thank you!