> -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
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
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)
, 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
[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
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
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