[R] Error in length of vector ?

[Sérgio Nunes]

Thanks. Using as.POSIXct() worked fine, length = 10000.
Basically I cannot have a column of POSIXlt values in a matrix?

Sérgio Nunes

On 3/2/07, Petr Pikal <petr.pikal at precheza.cz> wrote:
> Hi
>
> you stepped on a difference between POSIXct and POSIXlt
>
> Details
> There are two basic classes of date/times. Class "POSIXct" represents
> the (signed) number of seconds since the beginning of 1970 as a
> ***numeric vector***. Class "POSIXlt" is a ***named list*** of
> vectors representing
>
> so you need to change your POSIXlt - named list to POSIXct by
>
> as.POSIXct(your vector)
>
> HTH
> Petr
>
> Maybe it could be useful to give some kind of warning into the help
> page of strptime e.g.
>
> Be aware of length of an objects created by strptime as POSIXlt
> class.  It is always 9. See Details section of  DateTimeClasses.
>
>
> On 2 Mar 2007 at 12:33, Sérgio Nunes wrote:
>
> Date sent:              Fri, 2 Mar 2007 12:33:46 +0000
> From:                   "Sérgio Nunes" <snunes at gmail.com>
> To:                     r-help at stat.math.ethz.ch
> Subject:                [R] Error in length of vector ?
>
> > Hi,
> >
> > I'm having a weird result with the length() function:
> >
> > >a
> > [... omited ...]
> > [9994] NA                    "2003-12-03 16:37:00" "2002-06-26
> > 18:43:00" [9997] "2005-07-04 04:00:00" "2007-02-16 22:09:00"
> > "2007-02-24 15:49:00" [10000] NA
> >
> > > length(LastModified)
> > [1] 9
> >
> > > length(c(LastModified))
> > [1] 9
> >
> > I was expecting to get "10000" as an answer.
> > I'm trying to bind two vector, and I keep getting the error - "number
> > of rows of result is not a multiple of vector length". Thus I tested
> > length and got this value.
> >
> > Any hint?
> >
> > Thanks in advance,
> > Sérgio Nunes
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch 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.
>
> Petr Pikal
> petr.pikal at precheza.cz
>
>