[R] request: which integer in each column is in majority

[Uwe Ligges]

Muhammad Azam wrote:
> Respected R helpers/ users
> I am one of the new R user. I have a problem regarding to know which of the integer in each column of the following matrix is in majority. I want to know that integer e.g. in the first column 1 is in majority. Similarly in the third column 4 is in majority. So what is the suitable way to get the desired integer for each column. I am looking for some kind reply. Thanks
> example:
>> x=matrix(c(1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,4,1,2,3,3),ncol=4)
>> x
>      [,1] [,2] [,3] [,4]
> [1,]    1    2    3    4
> [2,]    1    2    4    1
> [3,]    1    3    4    2
> [4,]    2    3    4    3
> [5,]    2    3    4    3
> 

Probably bad but working example:

apply(x, 2, function(x) as.numeric(names(which.max(table(x)))[1]))


Uwe Ligges



> best regards
> 
> Muhammad Azam 
> Ph.D. Student 
> Department of Medical Statistics, 
> Informatics and Health Economics 
> University of Innsbruck, Austria 
> 
> 
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> 
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