| T O P I C R E V I E W |
| ouss |
Posted - 11/18/2014 : 04:24:07 AM
HELLO !
My main problem is how to differentiate an equation in ORIGIN 9.0 ??
The equation is too long it's an addition of a 3 exponential functions
f(X)=[a0*(1-exp(-2(x/W)^2 ))+a1*(1-exp(-2x^2 )(1+4(x/W)^4))+a2*(1-exp(-2(x/W)^2 )(1+8(x/W)^4-8(x/W)^6+4(x/W)^8))]
with just one variable x, w and the coefficients (a0,a1,a2) are unknown constants.
How Can I input all this parameters in ORIGIN 9.0 to get the derivate function ?
THANK YOU VERY MUCH FOR YOUR RESPONDS ! |
| 3 L A T E S T R E P L I E S (Newest First) |
| lkb0221 |
Posted - 11/18/2014 : 11:43:42 AM
Well, it might be a little complicated...
Please see the following tutorial about how to build fitting functions with differential equation:
http://www.originlab.com/doc/Tutorials/Fitting-Ordinary-Differential-Equation |
| ouss |
Posted - 11/18/2014 : 11:33:44 AM
Hi zheng
I want to make a fit builder to the seconde derivate function
If you can provide me the instructions and steps to make a fit builder from this seconde derivate function please tell me !
Thank you very much.
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| lkb0221 |
Posted - 11/18/2014 : 10:52:18 AM
Hi, Ouss
You want just calculate the result of the function or building a fitting function?
Zheng |
