I'm guessing the OP wanted to transpose a matrix - your suggested solution will not achive this
Now this was interesting!
A guess is as good as a poop in the dark...
1. How very intelligent of you. Give me a good example of UUOC when it comes to tr? It IS a typical filter program isn't it? Spare me the von oben.
2. Was there anything in the question that indicated that he wanted to have a transposed matrix from the source? Instead of just splitting? I tried to supply a simple solution to a simple question. And Did I not specifically state that "Depends on if You want to group it or so but the simplest way would be", so what is Your problem? If he need clarification which is the normal way to go here, he can do so in a following post. And in that case I can give further examples.
I have seen your posts of "RTFM" and I don't agree. I like to try to help as far as I can go.