[R] Problem with strptime

Hello, I have a column with dates in the form %Y-%m-%d %H:%M:%S; I want to substract the line i+1 to the line i and get a numeric result (in seconds for instance). This is what I did (I take the data from a database): res<- dbSendQuery (con, "SELECT Date_Heure FROM data.meteo ")Time<-fetch(re

Re: [R] How to get the day of the year

Thanks a lot to all of you, it works now Cheers, Solène Goy> Subject: Re: [R] How to get the day of the year> From: [EMAIL PROTECTED]> To: [EMAIL PROTECTED]> CC: r-help@r-project.org> Date: Wed, 1 Oct 2008 13:52:09 +0100> > On Wed, 2008-10-01 at 08:42 +, Solene

[R] How to get the day of the year

Hello, I am new to R and I would like to get the day of the year from numerous data in the following form: %a %d/%b/%Y %H:%M:%S (for example from Tu 10/Jul/2007 21:59:13 I would like to get 191) Whatever I try, I get NAs. Well... I need your help, please! Thanks in advance Yours sincerely,