Dear R users I am puzzled by the following result from R script. I am trying to convert local time to UTC time. Time zone is -5, therefore I used the following approach.
Below is the script. > Corrected_SA_data$date_time[k-1] [1] "2007-03-11 01:00:00" > Corrected_SA_data$TZ[k-1] [1] -5 > Corrected_SA_data$date_time[k-1]-Corrected_SA_data$TZ[k-1]*3600 [1] "2007-03-11 07:00:00 MDT" I was expecting this last value to be something like "2007-03-11 06:00:00 UTC" Please correct me if I ma wrong. On the other hand I have > Corrected_SA_data$date_time[k] [1] "2007-03-11 02:00:00" > Corrected_SA_data$TZ[k] [1] -5 > Corrected_SA_data$date_time[k]-Corrected_SA_data$TZ[k]*3600 [1] NA I am not sure why I am getting NA. Thank you for your help. Alemu [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.