You are storing the results in to a vector that is converted to
numeric; that is why you see the numbers. Try this:
> dataval=as.Date("2011/07/01")
> date_val=seq(dataval,length=260,by="-7 day")
> date_inizio=c()
> date_condizione=c()
> for (k in 1:length(date_val)){
+ date_inizio[k]=seq(date_val[k],length=2,by="-5 years")[2]
+ date_condizione[k]=seq(date_val[k],length=2,by="-2 years")[2]
+ }
> str(date_inizio)
num [1:260] 13330 13323 13316 13309 13302 ...
> class(date_inizio) <- "Date"
> str(date_inizio)
Date[1:260], format: "2006-07-01" "2006-06-24" "2006-06-17"
"2006-06-10" "2006-06-03" "2006-05-27" ...
>
On Thu, Jul 7, 2011 at 9:35 AM, <barbara.r...@uniroma1.it> wrote:
>
> I have to construct a vector of date with a cycle "for". I use the function
> "seq", but when I allocate in a vector, this becomes a number!!!
> How do I have? thank you
> Example:
> dataval=as.Date("2011/07/01")
> date_val=seq(dataval,length=260,by="-7 day")
> date_inizio=c()
> date_condizione=c()
> for (k in 1:length(date_val)){
> date_inizio[k]=seq(date_val[k],length=2,by="-5 years")[2]
> date_condizione[k]=seq(date_val[k],length=2,by="-2 years")[2]
> }
> ______________________________________________
> R-help@r-project.org mailing list
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
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and provide commented, minimal, self-contained, reproducible code.
