Re: Data Smoothing Algorithms


"Jim Y" <jj819stuffNOSPAM@xxxxxxxxxxx> wrote in message
news:HMednd7TUsuTY2nZnZ2dnUVZ_tOdnZ2d@xxxxxxxxxxxxxx

"Stan Weiss" <srweiss@xxxxxxxxx> wrote in message news:44F49BFF.2C61815@xxxxxxxxxxxx
I have some data that I am graphing. You can see the curve but instead
of being smooth it has peaks and valley in it. Does am one have any data
smoothing algorithms or can point me to any. I am using VB6 SP5.
Thanks
Stan

Try searching Google with "Data Smoothing Algorithms". I got about 70 sites and looked at about a
dozen of so. A couple have the theory behind the mathematics.

About 20 years ago, I had a program in GWbasic (DOS basic) that I used to smooth out curves. I
may still have the code (saved in ASCII) on a disk somewhere. I began using the Least Squares
Parabola method because it suited my needs. If you are not familiar with the method, look up
"Schaum's Outline Series. Theory and Problems of Probability and Statistics", ISBN 0-07-060220-4,
Chapter 8: Curve Fitting, Regression and Correlation.

Jim Y

I found a disk with a modified version of the above program. This one uses code that I found in a
text for creating various degrees of curve for the same data. The user can select the curve to go
through each point or a range of curves between to a straight line.

I have not looked at it for many years, but if you know CWbasic and want to attempt understanding
and adapt it let me know. It is about 28-30 kb in size if I remember.

Jim Y


.