On Tue, 31 Aug 2021, Richard O'Keefe wrote:
I made up fake data in order to avoid showing untested code. It's not part of the process I was recommending. I expect data recorded every N minutes to use NA when something is missing, not to simply not be recorded. Well and good, all that means is that reshaping the data is not a trivial call to matrix(). It does not mean that any additional package is needed or appropriate and it does not affect the rest of the process.
Richard, The instruments in the gauge pipe don't know to write NA when they're not measuring. :-) The outage period varies greatly by location, constituent measured, and other unknown factors.
You will want the POSIXct class, see ?DateTimeClasses. Do you know whether the time stamps are in universal time or in local time?
The data values are not timestamps. There's one column for date a second colume for time and a third column for time zone (P in the case of the west coast.
Above all, it doesn't affect the point that you probably should not be doing any of this.
? (Doesn't require an explanation.) Rich ______________________________________________ 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.
