Function Smooth-Hanning
(
smooth-hanning < data > )
Smooths `data' by replacing each element with the weighted mean of it and its
two neighbors. The weights are 1/2 for itself and 1/4 for each neighbor. The
ends are handled by duplicating the end elements. This function is not
destructive; it returns a list the same length as `data,' which should be a
sequence of numbers.