R - Date format check

Question

I am trying to check whether a given date is in dd/mm/yyyy format or not in R language and also whether it is a valid date or not at the same time. I want output in TRUE or FALSE format, e.g.

Input:

date<- c('12/05/2016','35/11/2067','12/52/1000')

Output:

TRUE FALSE FALSE

Answer 1

You can use this function:

IsDate <- function(mydate, date.format = "%d/%m/%y") {
  tryCatch(!is.na(as.Date(mydate, date.format)),  
           error = function(err) {FALSE})  
}

IsDate(date)
[1]  TRUE FALSE FALSE

Original source of the code here.

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