[R] For and if confusion
ggrothendieck at gmail.com
Thu Dec 18 16:05:24 CET 2008
Make a series of ones from each start/end pair and merge them all
with A using fill = 0. We have returned a ts series since that seems
to be what you are using but we could have left off the as.ts to
return a zoo series in the end:
X <- as.Date(c("01-03-1993", "01-05-1997"), "%d-%m-%Y")
Xs <- zoo(1, as.yearmon(seq(X, X, "month")))
Y <- as.Date(c("01-02-1995", "01-08-1999"), "%d-%m-%Y")
Ys <- zoo(1, as.yearmon(seq(Y, Y, "month")))
A <- ts(rnorm(120), freq=12, start=c(1992,8))
as.ts(with(merge.zoo(Xs, Ys, A, fill = 0), pmax(Xs, Ys)))
On Thu, Dec 18, 2008 at 5:12 AM, Shruthi Jayaram
<shruthi.jayaram.85 at gmail.com> wrote:
> I have two date objects
> X <- c("01-03-1993", "01-05-1997") #Mar 1993 and May 1997
> Y <- c("01-02-1995", "01-08-1999") #Feb 1995 and Aug 1999
> and a time series object
> A <- ts(rnorm(120), freq=12, start=c(1992,8)) #Aug 1992 to Aug 2002
> I want to create a binary (0-1) vector B that is of length 1:(A).
> B should have value 1 for the time periods *across* my character vectors,
> i.e. between Mar 93 ad Feb 95, and also between May-97 and Aug-99, but zero
> Would anyone have any ideas on how to do this? I would paste the code I am
> trying, but it would confuse rather than clarify (R newbie!). Am getting
> really lost in 'for' and 'if' loops, so would really appreciate any help!
> View this message in context: http://www.nabble.com/For-and-if-confusion-tp21069934p21069934.html
> Sent from the R help mailing list archive at Nabble.com.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
More information about the R-help