When I try to use the Savitsky-Golay routine to smooth 2-D data in Origin, the routine says that I need equally-spaced x data points. Is there a way to:
(a) Make the Savitsky-Golay routine work with unevenly-spaced data points or
(b) Interpolate between y values for the entire data set to get evenly-spaced x-values?
This seems odd in a filter as real data is often unevenly-spaced in x
(a) S-G smoothing currently does not support unevenly spaced data. The other smoothing options of adjacent averaging and FFT accept unevenly spaced data. (b) Plot the data and perform interpolation using the menu item Analysis->Interpolate/Extrapolate, and then perform smoothing on the interpolated data.
Savitsky-Golay Smoothing
Posted - 05/14/2003 : 11:58:12 AM
