[Haskell-beginners] Error with floats in implementation of Horner's method.

[Andrew Fleckenstein]

Hi all,

I have implemented Horner's method for evaluating a polynomial as follows:

-- the nth horner element, given a list of coefficients and a value at
which it needs to be evaluated

horner_element l x n
    | n == (length l)-1 = last l
    | otherwise = (l !! n) + (horner_element l x (n+1))*x

-- compute a polynomial given as a list of coefficients at the value x
using horner's method.

horner l x = horner_element l x 0
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