Newton Interpolation polynomial: - NPTEL
www.nptel.ac.in › content › storage2Newton Interpolation polynomial: Suppose that we are given a data set . Let us assume that these are interpolating points of Newton form of interpolating polynomial of degree i.e. (1) The Newton form of the interpolating polynomial is given by. (2) For i=0, from (1) & (2) we get. (3.1) For , from (1) & (2) we get.
Newton polynomial - Wikipedia
https://en.wikipedia.org/wiki/Newton_polynomialAs can be seen from the definition of the divided differences new data points can be added to the data set to create a new interpolation polynomial without recalculating the old coefficients. And when a data point changes we usually do not have to recalculate all coefficients. Furthermore, if the xi are distributed equidistantly the calculation of the divided differences becomes significantly easier. Therefore, the divided-difference formulas are usually preferred over the Lagrange formfo…