I have a vector of decimal numbers, which represent 'decimal day', the fraction of a day. I want to convert it into HH:MM format using R.
For example, the number 0.8541667
would correspond to 20:30
. How can I convert the numbers to HH:MM
format?
Try this:
R> format(as.POSIXct(Sys.Date() + 0.8541667), "%H:%M", tz="UTC")
[1] "20:30"
R>
We start with a date--which can be any date, so we use today--and add your desired fractional day.
We then convert the Date type into a Datetime object.
Finally, we format the hour and minute part of the Datetime object, ensuring that UTC is used for the timezone.