| T O P I C R E V I E W |
| johnvl |
Posted - 05/29/2015 : 1:10:22 PM
Origin Ver. and Service Release (Select Help-->About Origin):
Operating System:
Hello
I have a set of data and i want to find the best fitting function that correlates them(that with the least error).Can anyone suggest me a way to do that?(I think langrangian interpolation is a way but i cant find how it works on origin)Note:the curve fitting option options such as Gaussian is not sufficient.The data set is:1 2.1806
1 2.2159
1 2.5
1.1 3.8397
1.1323 3.9568
1.3169 4.0148
1.3169 4.0452
1.34 4.0722
1.36 4.1847
1.37 4.1864
1.4399 4.1397
1.53 4.1859
1.67 4.1866
ddc |
| 3 L A T E S T R E P L I E S (Newest First) |
| jasonzhao |
Posted - 06/01/2015 : 02:54:19 AM
Hello,
You mentioned that 'langrangian interpolation' which should be a kind of polynomial interpolation, and you also point out that a fitting is need, so why not try the Poly_n function in Analysis: Fitting: Nonlinear Fit: Polynomial Category, a 5 order polynomial could be tried first.
http://www.originlab.com/doc/Origin-Help/Poly5-FitFunc
Best regards!
Jason
OriginLab Technical Service |
| johnvl |
Posted - 05/31/2015 : 6:16:01 PM
I cant find the funcRank.I have OriginPro 9
ddc |
| lkb0221 |
Posted - 05/29/2015 : 1:54:08 PM
See this:
http://www.originlab.com/doc/Origin-Help/fitrank-multi-func |
