isDate | R Documentation |
Test if a vector can be a class Date
isDate(x, date.format)
x |
a vector |
date.format |
a character string as in as.Date |
vector
JuG
dates <- c("02/27/92", NA, "01/14/92", "02/28/92", "02/01/92")
isDate(dates, date.format= "%m/%d/%y")
data <- data.frame( Date=c("10/11/2012","10/12/2012", "25/12/2012"),
AE=c(1211,100,23),
Percent=c(0.03,0.43,"a"),
Date2=c("10/27/2012","10/12/12","12/25/12" ))
sapply(data,isDate)
sapply(data,isDate, date.format= "%m/%d/%y")
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