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liliangomez
Spain
2 Posts |
 Posted - 10/20/2012 : 06:47:17 AM
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Origin Ver. and Service Release (Select Help-->About Origin):
Operating System:
Hi
Im trying to run some non linear fittings of experimental data points using a user defined function, but when I try to simulate the function, it doesn´t have the right way, so I guess that Im introducing wrong the function (Bonner Fischer equation),
Y= (0,375*(g^2))*(0,25+0,1079*(J/T)+0,1554*((J/T)^2))/(T*(1+1,4288*(J/T)+0,3563*((J/T)^2)+2,2571*((J/T)^3)))
can somebody tell me what is wrong in my equation?  |
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cc261
22 Posts |
Posted - 10/22/2012 : 04:50:50 AM
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0,375 should be 0.375
0,25 should be 0.25
0,1079 should be 0.1079
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greg
USA
1378 Posts |
Posted - 10/30/2012 : 11:34:52 AM
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Origin should work with your settings, so 0,375 etc. should be fine.
Your function compiles OK, but I do not know which is your Independent variable and which are the parameters.
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liliangomez
Spain
2 Posts |
Posted - 10/30/2012 : 11:53:13 AM
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thanks for reply.
Problem solved. My independient variable is T, the dependient variable is Y, and I need to determine the parameters g and J. I don´t understand why if I used "," in the experimental data, I have to put "." in the equation, but it works.
again thanks to both for reply |
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non linear curve fit