Louis Martin wrote:
> Hi,
>
> I have a matrix of duplicate rows. How to output a list the unique rows with
> their count? I have used "unique" to have the unique rows, but can't produce
> the occurences of each unique row.
>
Hi Louis,
If you want the unique rows returned, this might do the job.
unique.rows<-function(x) {
nrows<-dim(x)[1]
urows<-1:nrows
for(i in 1:(nrows-1)) {
for(j in (i+1):nrows) {
if(!is.na(urows[j])) if(all(x[i,]==x[j,])) urows[j]<-NA
}
}
return(x[urows[!is.na(urows)],])
}
Jim
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