Having to collect hourly electricity loads and quarter-of-an-hour electricity production data for some years I think that the tidiest way of doing it is to resort to ts but I don't know how to define such a frequency starting from a set date.
Leafing through r-help mail archives I've found this *ALMOST* satisfactory message: ========================================================== ......... > I have a series of hourly rainfall and quarterly flow > measurements (i.e. 4 times an hour) of a catchment ........ > Maybe time series are easier, but in > > ts(data = NA, start = X,... > > X should be a number or a vector. how does this coresponds to a > data and hour (e.g. april 26,2002, 15:00:00)? If your observations are equidistant, e.g. you've got 24 hourly measurements per day, you could do something like this for the above example: R> rain <- ts(rain, start = c(26, 15), freq = 24) R> flow <- ts(flow, start = c(26, 15), freq = 96) ........... ============================================================ But how does R know that we are speaking of a timeseries starting from April 26, 2002 and not, say, Feb 26, 2000? There's some piece of info missing in the answer. Am I correct? Please help. Ciao from Rome Vittorio ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help