Newton's Forward Difference Formula
math.iitm.ac.in › caimna › interpolationi.e., the nth degree polynomial approximation for f(x)can be written as f(x) @ Pn(x) = f0+ rDf0+ r(r-1) D2f0 r(r-1) . . . (r - n +1) Dnf0 2! n! The formula is called Newton's (Newton-Gregory) forward interpolation formula. So if we know the forward difference values of fat x0until order nthen the above formula is
Newton's Interpolation Formulae
www.nptel.ac.in › content › storage2Newton's Interpolation Formulae As stated earlier, interpolation is the process of approximating a given function, whose values are known at tabular points, by a suitable polynomial, of degree which takes the values at for Note that if the given data has errors, it will also be reflected in the polynomial so obtained.