[R] Multiple lines for each record: how do I handle that

Luca Meyer lucam1968 at gmail.com
Wed Feb 22 20:49:18 CET 2012

Sure, I am sorry I have not done that in the first place.

The datasets I have looks like:

id <- c(1,1,2,2,2,3)
v1 <- c(NA,1,NA,1,NA,1)
v2 <- as.character(c("yes","","no","","","yes"))
v3 <- as.factor(c(NA,1,NA,NA,3,2))
d0 <- data.frame(id,v1,v2,v3)

What I would need is to derive a dataset that looks like:

id <- c(1,2,3)
v1 <- c(1,1,1)
v2 <- as.character(c("yes","no","yes"))
v3 <- as.factor(c(1,3,2))
d1 <- data.frame(id,v1,v2,v3)

The issue is related to the need to have an automated procedure that reads in the different variable types and aggregates them accordingly as every dataset will be different from the previous in terms of number of variables and records involved.

Thank you,

Il giorno 22/feb/2012, alle ore 20.26, Sarah Goslee ha scritto:

> If you provide a small reproducible example of your data format and
> expected output, I'm sure someone here can offer a useful solution.
> Without knowing what your data look like, not so easy.
> Sarah
> On Wed, Feb 22, 2012 at 2:22 PM, Luca Meyer <lucam1968 a gmail.com> wrote:
>> Hi Folks,
>> I just discovered that my dataset (coming from QuestionPro platform) has got multiple lines for each respondent id, but what I would really need is a "regular" data matrix where each respondent's data is shown on a single line.
>> Does anyone has already develop a procedure that automatically takes the multiple lines and aggregates them into a single line?
>> Thank you in advance,
>> Luca
>> Mr. Luca Meyer
>> www.lucameyer.com
>> R version 2.14.1 (2011-12-22)
>> Mac OS X 10.6.8
> -- 
> Sarah Goslee
> http://www.functionaldiversity.org

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