| T O P I C R E V I E W |
| saurabhd0911 |
Posted - 07/04/2016 : 01:33:49 AM
Origin Ver.8.0 and Service Release (Select Help-->About Origin):
Operating System:Windows 10 Basic
Dear all,
I want to fit a plot using following equation:
(alpha)2/(1-alpha)=1/2KC[M]
and the plot is of alpha against M.
Can anyone please suggest me how to fit a curve with this equation. Also I want you to know that I tried putting this equation:
y2/(1-y)=1/2a*b*x
Here K is to be found and C is known. BUt I didnt get the plot correctly. Somebody please help me out with this. |
| 5 L A T E S T R E P L I E S (Newest First) |
| Shirley_GZ |
Posted - 07/07/2016 : 01:03:44 AM
Hi,
The details of the Fit Status code are here,
http://www.originlab.com/doc/Origin-Help/NLFit-Result-FitStatusCode
According to the error message, you are suggested to check the initial values and parameter constraints firstly. If still problem, please send us the project file(with fitting results) and the *.FDF file you defined via tech@originlab.com.
Please provide the serial number of your Origin in your email. We need it to record your question in our problem tracking base.
Thanks,
Shirley
Originlab Technical Service Team |
| saurabhd0911 |
Posted - 07/06/2016 : 08:17:17 AM
Yes, I mean ellipsoid.dat file.
However, I tried fitting another simplified equation
alpha= (1+8KCM)^1/2-1/4KCM
as y= (1+8*a*b*x)^1/2-1/4*a*b*x
However, this time I got the exact parameters whereas earlier this was not the case. But it says error 207 Fitting not proper. Can you suggest me a way out of it? |
| Shirley_GZ |
Posted - 07/05/2016 : 06:08:28 AM
Do you mean the sample data "Ellipsoid.dat"? It is shipped with Origin, but not included in Origin 8.0.
If you want to follow the tutorial, the required minimum Origin version is Origin 9.0 SR1, just as the note in the Summary section.
Thanks,
Shirley
Originlab Technical Service Team |
| saurabhd0911 |
Posted - 07/05/2016 : 05:16:29 AM
I tried following the instructions as given in the tutorial site by going through Samples>curve fitting> but I cannot see Implicit.Dat file. Can you please help me out here.
Thank you. |
| Shirley_GZ |
Posted - 07/04/2016 : 11:27:54 PM
Hi Saurabhd0911,
I suppose that the equation of your fitting function is
y*2/(1-y)=1/2*a*b*x
It is an implicit fitting function which has been supported since 9.0 SR1. You can refer to this tutorial:
http://www.originlab.com/doc/Tutorials/ImplicitFit-3Var
You can download Origin 2016 SR2 demo version to have a try, http://www.originlab.com/demodownload.aspx
Thanks,
Shirley
Originlab Technical Service Team |
