The root of your problems lie in your assumption that xts variables act like data frames. Instead they are matrices with an index attribute. All values in a matrix must be of the same storage mode.
You might want to investigate the data.table package. It is not a time series object but you can still handle time series operations and you can have any type of data. --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity. On September 3, 2015 5:40:36 PM PDT, ce <zadi...@excite.com> wrote: > >Hello > >Let's say some questions about merging xts variables : > >a<- xts("abc", Sys.Date()) >b <- xts("def", Sys.Date()) >c <- xts(1, Sys.Date()) > >> merge(a,b) > a b >2015-09-03 "abc" "def" >> merge(a,b,c) > a b c >2015-09-03 NA NA 1 >Warning messages: >1: In merge.xts(a, b, c) : NAs introduced by coercion >2: In merge.xts(a, b, c) : NAs introduced by coercion >3: In merge.xts(a, b, c) : NAs introduced by coercion >4: In merge.xts(a, b, c) : NAs introduced by coercion > >How I can merge a, b ,c correctly ? Another example is with Binary >variables : > >> e<- xts(TRUE, Sys.Date()) >> e > [,1] >2015-09-03 TRUE >> merge(e,b) > e b >2015-09-03 1 NA >Warning message: >In merge.xts(e, b) : NAs introduced by coercion > > >My second question is how I can convert an xts object to factor : > >> d <- merge(a,b) >> d > a b >2015-09-03 "abc" "def" >> factor(d, levels = c("abc","def")) > a b >abc def >Levels: abc def > >Date disappears here? > >Thanks for your help >ce > >______________________________________________ >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.