R: Check If an Object Is of Type Date

IsDate {DescTools} | R Documentation

## Check If an Object Is of Type Date

### Description

Check if the given x is of any known Date type.

### Usage

    IsDate(x, what = c("either", "both", "timeVaries"))

### Arguments

`x` | a vector or values to be checked.
`what` | can be any value out of "`either`" (default), "`both`" or "`timeVaries`".

### Details

This checks for many known Date and Time classes: "POSIXt", "POSIXct", "dates", "times", "chron", "Date".

### Value

logical vector of the same dimension as x.

### Author(s)

Frank E Harrell

### See Also

`Year`, `Month`, etc.

### Examples

    IsDate(as.Date("2013-04-10"))

    IsDate(31002)

[Package DescTools version 0.99.34 Index]