Hello, I have a following time series data
head(mend.dat)
ID PARAM Year Month Day Value SYM
1 15052500 1 1965 5 15 128 A
2 15052500 1 1965 5 16 135 A
3 15052500 1 1965 5 17 157 A
4 15052500 1 1965 5 18 176 A
5 15052500 1 1965 5 19 198 A
6 15052500 1 1965 5 20 241 A
I have loaded these data into as a zooreg object. The entire time
series runs from 1965-05-15 until 2010-12-31.
I have generated dates using ISOdatetime.
regts.start <- ISOdatetime(year.start, mo.start, day.start, hour=0,
min=0, sec=0, tz="GMT")
regts.end <- ISOdatetime(year.end, mo.end, day.end, hour=0, min=0,
sec=0, tz="GMT")
Then, I generate a zoo time series from the data.
zts <- zooreg(mend.dat$Value, start = regts.start, end = regts.end,
frequency = 1, deltat = 86400)
I now want to subset using window.
window(zts, start=as.Date("2000-01-01"), end=as.Date("2000-01-02"))
This results in the following error message.
Data:
factor(0)
1496 Levels: 100 1000 10000 101 1010 10100 102 1020 103 1030 104 1040
105 1050 10500 106 1060 107 1070 108 1080 ... Eqp
Index:
character(0)
Warning messages:
1: In which(in.index & all.indexes >= start & all.indexes <= end) :
Incompatible methods ("Ops.POSIXt", "Ops.Date") for ">="
2: In which(in.index & all.indexes >= start & all.indexes <= end) :
Incompatible methods ("Ops.POSIXt", "Ops.Date") for "<="
Why is this happening?
Thanks for your help.
Katrina Bennett
______________________________________________
R-help@r-project.org mailing list
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.
