Polynomial regression: Difference between revisions
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Note that this implementation does not use floating point numbers, so we do not introduce floating point errors. Using exact arithmetic has a speed penalty, but for small problems like this it is inconsequential.
The above solution fits a polynomial of order 11. If the order of the polynomial is known to be 3 (as is implied in the task description) then the following solution is probably preferable.
<lang j> Y (%. (i.3) ^/~ ]) X
1 2 3</lang>
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