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problem with Dates
2 messages · venkata kirankumar, Gabor Grothendieck
Try this (and read R News 4/1): Lines <- "6/4/1992 12:00:00 AM 2/13/1992 12:00:00 AM 6/19/1992 12:00:00 AM 2/11/1992 12:00:00 AM 6/22/1992 12:00:00 AM 10/3/1991 12:00:00 AM 5/12/1992 12:00:00 AM 7/11/1991 12:00:00 AM 2/6/1992 12:00:00 AM 10/4/1991 12:00:00 AM 1/31/1992 12:00:00 AM 6/9/1992 12:00:00 AM 10/9/1991 12:00:00 AM 6/10/1992 12:00:00 AM 7/19/1991 12:00:00 AM 7/18/1991 12:00:00 AM 9/20/1991 12:00:00 AM 8/6/1992 12:00:00 AM 8/12/1992 12:00:00 AM 8/19/1992 12:00:00 AM 7/12/1991 12:00:00 AM 6/5/1992 12:00:00 AM 2/7/1992 12:00:00 AM 7/1/1992 12:00:00 AM 8/7/1992 12:00:00 AM 8/13/1992 12:00:00 AM" library(chron) DF <- read.table(textConnection(Lines), as.is = TRUE) # they are all dates so we don't need the time component # Here we use chron class since that accepts # mm/dd/yyyy format by default dd <- as.chron(DF[[1]]) dd[1] - dd[2] min(dd) # or use Date class DD <- as.Date(dd) DD[1] - DD[2] min(DD) On Thu, Mar 19, 2009 at 2:20 AM, venkata kirankumar
<kiran4u2all at gmail.com> wrote:
Hi all, I am strugling with date formates and caliculating diferent operations like different between 2 dates and getting minimum in vector of dates that is i m working with dates in formate ? ? ? ? "6/22/1992 ?12:00:00 AM" and the vector is [1] 6/4/1992 12:00:00 AM ? ? 2/13/1992 12:00:00 AM ? ?6/19/1992 12:00:00 AM ?[4] 2/11/1992 12:00:00 AM ?6/22/1992 12:00:00 AM ? ?10/3/1991 12:00:00 AM ?[7] 5/12/1992 12:00:00 AM ?7/11/1991 12:00:00 AM ? ?2/6/1992 12:00:00 AM [10] 10/4/1991 12:00:00 AM ?1/31/1992 12:00:00 AM ? 6/9/1992 12:00:00 AM [13] 10/9/1991 12:00:00 AM ?6/10/1992 12:00:00 AM ? ?7/19/1991 12:00:00 AM [16] 7/18/1991 12:00:00 AM ?9/20/1991 12:00:00 AM ? ?8/6/1992 12:00:00 AM [19] 8/12/1992 12:00:00 AM ?8/19/1992 12:00:00 AM ? ?7/12/1991 12:00:00 AM [22] 6/5/1992 12:00:00 AM ? ?2/7/1992 12:00:00 AM ? ? 7/1/1992 12:00:00 AM [25] 8/7/1992 12:00:00 AM ? ?8/13/1992 12:00:00 AM and here i have to get least date (means first initial date) and i have to get difference between that date to all other dates in vector i tried with ?functins like formate() and ?round() ? ?but its not woking on this formate of data can any one help me out to solve this thanks in advance ? ? ? ?[[alternative HTML version deleted]]
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