Hi,
On Mar 30, 2015, at 9:15 PM, Doran, Harold <hdo...@air.org> wrote:
> I�m struggling a bit with learning about POSIX objects to do some basic
> things with objects of this class. Suppose I have the following simple example
>
> times <- c("03:20", "29:56", "03:30", "21:03", "56:26")
>
> aa <- strptime(times, "%M:%S�)
>
> I can do means, and some other basic things, but I cannot correlate the
> objects with some other variable
>
> cor(aa, rnorm(5))
>
You can cast your POSIXlt values to numeric
cor(as.numeric(aa), rnorm(5))
> Also, for purposes of a user-interface I have built with shiny, I need for
> the time to be viewed as simply as minutes:seconds, such as this
>
> format(aa, '%M:%S�)
>
> But of course after doing this I lose the ability to work with this object as
> a time variable.
>
You may need to keep a copy of your times in a POSIX or numeric format in
addition to converting to character. It's hard to tell without more
information.
Cheers,
Ben
> Thank you
> Harold
>
> [[alternative HTML version deleted]]
>
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