Sorry I forgot the subject in my previous post
Here is an example of data : province and district code of 4 locations
datatry=matrix(c(8,12,3,3,1,1,16,1),4,2)
colnames(datatry)<-c("PROCODE","DISCODE")
DISCODE is not unique for each location (there is a distrcit nb 1 in each
province)
I want to create a third column (DIS) which would contain a unique district
code for each location that would be the appended values of the province code
and the district code, and that would be a numeric value (not a character)
here is my try (thanks to Henrique Dallazuanna!)
DIS=rep(0,nrow(datatry))
datatry=cbind(datatry,DIS)
datatry2=transform(datatry,DIS=paste(datatry[,1],datatry[,2]));
However it creates a string, and the 2 codes are separated by an empty space,
which I didn't manage to supress using different values for arguments "sep" and
"collapse".
i'll try to see other options to concatenate 2 numeric values into a third one.
Thanks
--- En date de : Jeu 21.1.10, Henrique Dallazuanna <www...@gmail.com> a écrit :
De: Henrique Dallazuanna <www...@gmail.com>
Objet: Re: [R] (no subject)
À: "teurlai magali" <teurlai...@yahoo.fr>
Cc: r-help@r-project.org
Date: Jeudi 21 Janvier 2010, 3h41
transform(DF, District_Unique = paste(Province, District, collapse = ''))
On Thu, Jan 21, 2010 at 12:34 AM, teurlai magali <teurlai...@yahoo.fr> wrote:
> Hi
>
> is there a way in R to create a new column vector with the numbers of 2
> others columns simply appended?
>
> Example : I have a column with provinces codes (1 to 19)
> I have a second column with districts codes (1 to ##, depending on the
> province)
> I want to create a third column with a code that would be unique for each
> district:
>
> Province District District_Unique
> 1 1 11
> 1 2 12
> 13 2 132
>
> I can create a loop, but it becomes complicated with numerous data
>
> Thanks for your help
>
>
>
>
>
> [[alternative HTML version deleted]]
>
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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