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Ingy döt Net 2023-07-01 11:58:00 -04:00
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11
Task/Polynomial-regression/Haskell/polynomial-regression-1.hs Normal file
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import Data.List
import Data.Array
import Control.Monad
import Control.Arrow
import Matrix.LU
ppoly p x = map (x**) p
polyfit d ry = elems $ solve mat vec where
mat = listArray ((1,1), (d,d)) $ liftM2 concatMap ppoly id [0..fromIntegral $ pred d]
vec = listArray (1,d) $ take d ry

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Task/Polynomial-regression/Haskell/polynomial-regression-2.hs Normal file
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*Main> polyfit 3 [1,6,17,34,57,86,121,162,209,262,321]
[1.0,2.0,3.0]