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I was told that each (x, y) pair is s/t
Great. An "s/t"!. Sorry. Trying to understand your problem has defeated me.
I think that may be your problem too. You cannot hope to solve a problem until you understand it. And one usually sure way of checking your understanding is to try and describe it to someone unfamiliar with the field.
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
In reply to Re^5: structuring data: aka walk first, grok later