On 2 Mar 2007 at 13:22, Sérgio Nunes wrote:
Date sent: Fri, 2 Mar 2007 13:22:43 +0000 From: "Sérgio Nunes" <[EMAIL PROTECTED]> To: "Petr Pikal" <[EMAIL PROTECTED]> Copies to: r-help@stat.math.ethz.ch Subject: Re: [R] Error in length of vector ? > Thanks. Using as.POSIXct() worked fine, length = 10000. > Basically I cannot have a column of POSIXlt values in a matrix? No, it has different length as it is a ***named list*** see e.g. Last.Modified[[1]] if it is POSIXlt class. Petr > > Sérgio Nunes > > On 3/2/07, Petr Pikal <[EMAIL PROTECTED]> 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" <[EMAIL PROTECTED]> > > To: r-help@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@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 > > [EMAIL PROTECTED] > > > > > > ______________________________________________ > R-help@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 [EMAIL PROTECTED] ______________________________________________ R-help@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.