jrv@SDIMAX2.MITRE.ORG (06/11/91)
I have uploaded to SIMTEL20:
pd1:<msdos.c>
SMOOTH11.ZIP 'Lowness' and 'split linear' data smoothers
SMOOTH reads pairs of numbers (x- and y-values) from the standard
input (or the given file), fits a smooth curve to the points, and
writes to the standard output points from the smooth curve.
Two smoothing algorithms are available. By default, the curve is
calculated using the "lowness" procedure developed by W. S.
Cleveland. This technique achieves robustness by decreasing
weights on data points which are far from the fitted line. The
"split linear smooth" procedure due to Art Owen is also provided.
It smooths the data while preserving sharp discontinuities in slope
or value.
- Jim Van Zandt
jrv@sdimax2.mitre.org