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TonyLadson/isGaugeNum.R

Last active August 29, 2015 14:20
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Test if a string is a valid gauge number
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isGaugeNum.R
isGaugeNum <- function(x) {
# returns true if value is missing, or a gauge number i.e. 6 digits followed by a capital letter
# otherwise returns false
if(!is.character(x)) return(FALSE)
if(is.na(x)) return(TRUE)
if(str_count(x) != 7) return(FALSE)
str_detect(x, "^[0-9]{6}[A-Z]{1}") # 6 digits followed by a capital letter
}
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