###### customizable show ########

const DECIMALS = 4

##### showing missing values ######

const NAN       = "NaN"
const NA        = "NA"
const BLACKHOLE = "\u2B24"
const DOTCIRCLE = "\u25CC"
const QUESTION  = "\u003F"
# const UNICORN   = "\u1F984" # doesn't render well

const MISSING = NAN
