[R] Keep only those values in a row in a data frame which occur only once.

Jim Lemon drjimlemon at gmail.com
Mon Jun 12 09:02:42 CEST 2017

Hi Ashim,
One way is this, assuming that your data frame is named akdf:

akdf<-t(apply(akdf,1,function(x) return(unique(x)[1:length(x)])))

If you want factors instead of strings, more processing will be required.

On Mon, Jun 12, 2017 at 3:23 PM, Ashim Kapoor <ashimkapoor at gmail.com> wrote:
> Dear All,
> I have a file data.txt as follows:
> Name_1,A,B,C
> Name_2,E,F
> Name_3,I,J,I,K,L,M
> I will read this with:
> my_data<- read.csv("data.txt",header=FALSE,col.names=paste0("V",
> seq(1:10)),fill=TRUE)
> Then the file will have 10 columns. I am assuming that each row in data.txt
> will have at the max 10 entries.
> Note: Here each row will have a different number of columns in data.txt but
> each row will have 10 ( some trailing blank columns ) columns.
> My query is how can I keep only the unique elements in each row? For
> example: I want the row 3 to be Name_3,I,J,K,L,M
> Please note I don't want the 2nd I to appear.
> How can I do this?
> Best Regards,
> Ashim
>         [[alternative HTML version deleted]]
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