Re: [R] Sorting data.frame and again sorting within data.frame

2013-04-16 Thread Katherine Gobin
Dear Sir, Thanks a lot for your valuable input and guidance. Regards Katherine --- On Mon, 15/4/13, Jeff Newmiller wrote: From: Jeff Newmiller Subject: Re: [R] Sorting data.frame and again sorting within data.frame To: "David Winsemius" , "Katherine Gobin" Cc: r-hel

Re: [R] Sorting data.frame and again sorting within data.frame

2013-04-15 Thread David Winsemius
On Apr 15, 2013, at 9:33 AM, Jeff Newmiller wrote: > Yes, that would be because she converted to Date on the fly in her example, > and so apparently did not need this reminder. I apologize, Iobviously missed that. So the answer was simply to put a minus sign in front of the as.Date() expressi

Re: [R] Sorting data.frame and again sorting within data.frame

2013-04-15 Thread Jeff Newmiller
Yes, that would be because she converted to Date on the fly in her example, and so apparently did not need this reminder. --- Jeff NewmillerThe . . Go Live... DCN:Basics: ##.#

Re: [R] Sorting data.frame and again sorting within data.frame

2013-04-15 Thread David Winsemius
On Apr 14, 2013, at 11:01 PM, Katherine Gobin wrote: > Dear R forum, > > I have a data.frame as defied below - > > df = data.frame(names = c("C", "A", "A", "B", "C", "B", "A", "B", "C"), dates > = c("4/15/2013", "4/13/2013", "4/15/2013", "4/13/2013", "4/13/2013", > "4/15/2013", "4/14/2013",

Re: [R] Sorting data.frame and again sorting within data.frame

2013-04-15 Thread arun
/2013 29 #5 C 4/13/2013 11 A.K. - Original Message - From: arun To: Katherine Gobin Cc: R help Sent: Monday, April 15, 2013 8:57 AM Subject: Re: [R] Sorting data.frame and again sorting within data.frame library(plyr) arrange(df,names,desc(dates)) #  names dates values #1

Re: [R] Sorting data.frame and again sorting within data.frame

2013-04-15 Thread arun
/2013 11 A.K. - Original Message - From: Katherine Gobin To: r-help@r-project.org Cc: Sent: Monday, April 15, 2013 2:01 AM Subject: [R] Sorting data.frame and again sorting within data.frame Dear R forum, I have a data.frame as defied below - df = data.frame(names = c("C"

Re: [R] Sorting data.frame and again sorting within data.frame

2013-04-15 Thread Jeff Newmiller
The examples in ?order show a method that could be applied if you avoid the decreasing argument and instead convert the Date to numeric for purposes of sorting. --- Jeff NewmillerThe . ..

[R] Sorting data.frame and again sorting within data.frame

2013-04-14 Thread Katherine Gobin
Dear R forum, I have a data.frame as defied below - df = data.frame(names = c("C", "A", "A", "B", "C", "B", "A", "B", "C"), dates = c("4/15/2013", "4/13/2013", "4/15/2013", "4/13/2013", "4/13/2013", "4/15/2013", "4/14/2013", "4/14/2013","4/14/2013" ),values = c(10, 31, 31, 17, 11, 34, 102, 47