Re: [R] Create a function to number each repeated visit or measurements

2012-09-04 Thread Nordlund, Dan (DSHS/RDA)
> -Original Message- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Jon Toledo > Sent: Monday, September 03, 2012 10:59 PM > To: r-help@r-project.org > Subject: [R] Create a function to number each repeated visit or > measure

Re: [R] Create a function to number each repeated visit or measurements

2012-09-04 Thread William Dunlap
gt; Of PIKAL Petr > Sent: Tuesday, September 04, 2012 4:08 AM > To: Jon Toledo; r-help@r-project.org > Subject: Re: [R] Create a function to number each repeated visit or > measurements > > Hi > > You did not provided any suitable data. > > x<-sort(sample(letter

Re: [R] Create a function to number each repeated visit or measurements

2012-09-04 Thread arun
edo ; "r-help@r-project.org" Cc: Sent: Tuesday, September 4, 2012 7:07 AM Subject: Re: [R] Create a function to number each repeated visit or measurements Hi You did not provided any suitable data. x<-sort(sample(letters[1:5], 50, rep=T)) unlist(lapply(split(x,x), function(x)

Re: [R] Create a function to number each repeated visit or measurements

2012-09-04 Thread Jon Toledo
, 7, 8, 9 > #5 e 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 > A.K. > > > > - Original Message - > From: PIKAL Petr > To: Jon Toledo ; "r-help@r-project.org" > > Cc: > Sent: Tuesday, September 4, 2012 7:07 AM > Subject

Re: [R] Create a function to number each repeated visit or measurements

2012-09-04 Thread PIKAL Petr
[mailto:r-help-bounces@r- > project.org] On Behalf Of Jon Toledo > Sent: Tuesday, September 04, 2012 7:59 AM > To: r-help@r-project.org > Subject: [R] Create a function to number each repeated visit or > measurements > > > Hi dear R list members, > I am trying to create

[R] Create a function to number each repeated visit or measurements

2012-09-03 Thread Jon Toledo
Hi dear R list members, I am trying to create a numerical variable that tracks the visits/entries that a subject has had. For example having a database of repeated serial measurements that are ordered by subject and time. So I would get a variable that says 0 for baseline visit/measurement, 1 f