How to do extrapolation
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回答（2 个）
Sean de Wolski
2012-2-28
1 个投票
4 个评论
Nasir Qazi
2012-2-28
Sean de Wolski
2012-2-28
It's a warning.
Sean de Wolski
2012-2-28
And you didn't give us enough information to help anyway. Is it a polynomial, one dimensional etc?
I mean polyfit/polyval will allow you to extrapolate, but is that what you want? I have no idea.
John D'Errico
2012-2-28
It is my absolutely favorite quote about mathematics, and one that does not seem to be too well known.
Walter Roberson
2012-2-28
I thought for a few seconds. “I’ll give you an example. Here’s a sequence, and I want you to tell me the next number.”
“I’ll do my best.”
“1, 1, 2, 3, 5, 8, 13, 21, 34, 55,” I said.
He looked puzzled. “Don’t be silly. I just asked you that one. It’s the Fibonacci sequence.”
“Is it? Then what’s next?”
“89,” Adam replied.
“Wrong. It’s 91.”
“But it looks just like the—”
“You’re leaping to conclusions, Adam, based on previous prejudices. Most injudicious. Your sequence was the Fibonacci sequence, but the nth term in my sequence is the least integer not less than Öe n–2, where Öe = 2.71828, the base of natural logarithms. I want the 11th term, which is the least integer not less than Öe9, or 90.017. That’s 91.”
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2012-2-28
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