Odd POSIXct Function Behavior In R

Question

I\'m working with the POSIXct data type in R. In my work, I incorporate a function that returns two POSIXct dates in a vector. However, I am discovering some unexpected beha

Answer 1

The problem is that the function c removes the timezone attribute:

attributes(myTime)
#$class
#[1] "POSIXct" "POSIXt" 
#
#$tzone
#[1] "UTC"

attributes(c(myTime))
#$class
#[1] "POSIXct" "POSIXt"

To fix, you can e.g. use the setattr function from data.table, to modify the attribute in place:

(setattr(c(myTime), 'tzone', attributes(myTime)$tzone))
#[1] "2015-01-01 UTC"