| T O P I C R E V I E W |
| superpmma |
Posted - 10/31/2017 : 09:26:35 AM
Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2017 SR2
Operating System: WIN7SR1
x y
0 0.319
0.01 0.444
0.02 0.619
0.03 0.843
0.04 1.091
0.05 1.288
0.06 1.348
0.07 1.227
0.08 1.002
0.09 0.768
0.1 0.567
0.11 0.412
0.12 0.305
0.13 0.225
0.14 0.169
0.15 0.127
Function y = 2*pi*1E-4*N*R^2/(R^2+(X-x)^2)^1.5 with parameter N,R,X
While use OriginPro 8.1SR2 with fitting Results
N N R R X X Statistics Statistics
Value Standard Error Value Standard Error Value Standard Error Reduced Chi-Sqr Adj. R-Square
B 100.29584 0.25982 0.04674 1.65226E-4 0.05843 8.69031E-5 3.14061E-5 0.99982
But when fitting in OriginPro2017, it says that "Fit did not converge - mutual dependency exists between parameters."
Superpmma
2017-10-31 |
| 2 L A T E S T R E P L I E S (Newest First) |
| superpmma |
Posted - 10/31/2017 : 11:18:52 PM
Thank you , it works now in 2017
Maybe X is system var, but the fitting passed in 8.1; Origin 2017 should give some hints that variable X,... is not preferred |
| arstern |
Posted - 10/31/2017 : 12:06:18 PM
Hi,
It seems that you will need to use a different variable than X. I tested with replacing X with A in the equation. Afterwards I was able to get the fit to converge.
y = 2*pi*1E-4*N*R^2/(R^2+(A-x)^2)^1.5
Hope this helps,
Thanks
Aviel
OriginLab |
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