How to make an empty vector of POSIXct

posixct, r

Solution

Since there is no POSIX `mode`, you cannot initialize a `POSIXct` vector with `vector()` alone (see `?mode` for a list of all mode types).

But we can use `.POSIXct` to create the vector from a character vector.

(x <- .POSIXct(character(10))) ## the same as .POSIXct(vector("character", 10))
# [1] NA NA NA NA NA NA NA NA NA NA
class(x)
# [1] "POSIXct" "POSIXt"

Also note that you can also use `.POSIXct(integer(10))` for a length 10 vector of origin date-times.

Problem

I want to make an empty vector of `POSIXct` so that I can put a `POSIXct` in it: ``` vec <- vector("POSIXct", 10) vec vec[1] <- "2014-10-27 18:11:36 PDT" vec ``` That does not work. Any ideas?

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