Iwona Wrobel and Krystyna Zietak, "On the Legendre-based filters of Persson and Strang"


In this paper we consider the Legendre-based method of Persson and Strang 
and its modification for smoothing uniformly spaced data.
The considered Legendre-based methods are numerically compared
with the classical Savitzky-Golay method for filtering uniformly
spaced data. We show how the Legendre-based filters can be
extended to irregularly spaced data.


key words:  smoothing filter, Persson-Strang method, Savitzky-Golay method,
uniformly spaced data, irreguraly spaced data