Dear R People:
I'm trying to convert a daily zoo object to a weekly zoo object:
xdate <- seq(as.Date("2002-01-01"),as.Date("2010-07-10"),by="day")
library(zoo)
length(xdate)
xt <- zoo(rnorm(3113),order=xdate)
xdat2 <- seq(index(xt)[1],index(xt)[3113],by="week")
xt.w <- aggregate(xt,by=xdat2,mean)
Error: length(time(x)) == length(by[[1]]) is not TRUE
aggregate(xt,by="week",mean)
Error: length(time(x)) == length(by[[1]]) is not TRUE
I'm not sure what is going wrong. Any help would be much appreciated.
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodg...@gmail.com
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