Hi Readers,
I have a question.
I have a large dataset and want to throw away columns that have the same
value in the column itself and I want to know which column this was.
For example
> x<-data.frame(id=c(1,2,3), snp1=c("A","G",
"G"),snp2=c("G","G","G"),snp3=c("G","G","A"))
> x
id snp1 snp2 snp3
1 1 A G G
2 2 G G G
3 3 G G A
Now I want to know that snp2 in monomorphic (the same value for the column)
and after I know which column it is I want to take these columns out.
Thanks,
Naomi
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