Hello all,
I am having a little trouble working with "strptime" and I was hoping
someone might be able to give me a hand. I have an instrument that outputs
an ordinal date and time in two columns something like this:
day.hour min.sec
1 12525 2050
2 12518 2029
3 12524 2023
4 12524 2028
5 12507 2035
Now the problem I am having is converting these numbers into dates and
times. I am able to convert these into their respective POSIXlt formats but
I am left with two columns where hour is left with the date (data$Only.Date)
and the date is left with the time (data$Only.Time). Can anyone recommend a
good way to convert these ordinal dates into something like the following?
day.hour min.sec Date Time
12511 2033 2011-05-05 11:20:33
## A trivial example
##a data frame
day.hour <-as.integer(runif(5, 12500, 12523)) #First 3 digits are the day of
the year, last 2 are the hour of the day
data <- as.data.frame(day.hour)
data$min.sec <-as.integer(runif(5, 2000, 2060)) #First 2 digits are the
minute, last 2 are the seconds
##example of how things get a little jumbled. strptime was easy enough to
use.
data$Date <- strptime(data$day.hour, format="%j%H")
data$Time <- strptime(data$min.sec, format="%M%S")
data
Using Ubuntu 10.10 and R 2.11.1. Thanks in advance!!!!
Sam
--
*****************************************************
Sam Albers
Geography Program
University of Northern British Columbia
3333 University Way
Prince George, British Columbia
Canada, V2N 4Z9
*****************************************************
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