unlist() list of dates

There are methods of the "c" function for things of class "POSIXlt" and "Date"
so do.call("c", dataList) works instead of unlist:
  > dateList <- list(LastWeekend=as.POSIXlt(sprintf("2011-12-%d", 10:11)),
  +                  Today=as.POSIXlt("2011-12-12"))
  > z <- do.call("c", dateList)
  > z
      LastWeekend1     LastWeekend2            Today
  "2011-12-10 PST" "2011-12-11 PST" "2011-12-12 PST"
  > str(z)
   POSIXlt[1:3], format: "2011-12-10" "2011-12-11" "2011-12-12"
   - attr(*, "names")="LastWeekend1" "LastWeekend2" "Today"

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Ana
Sent: Monday, December 12, 2011 9:03 AM
To: r-help at r-project.org
Subject: [R] unlist() list of dates

how can I keep the date info after doing unlist to a list of dates?

I have a list of dates were observations were made for each station in
each month

list.obs[[station]][month]

[1] "1979-01-01" "1979-01-10" "1979-01-25"

[1]     0     1     2     3

when i try to unlist i loose the date info.

what am I doing wrong?

______________________________________________
R-help at 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.