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kanzhipeng

1 Posts
Posted - 05/31/2017 :  4:28:23 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
Origin Ver. and Service Release (Select Help-->About Origin):
Operating System:

Hello all, I want to fit experimental data based on following equation:



where e, A, and d are constants, r (gama) is the fitting parameter. How to fit this with origin? Thanks in advance.

data:

td Qpre Qcoll
1E-8 1.029113E-11 7.372707E-11
1.047129E-8 1.062333E-11 7.313067E-11
1.096478E-8 1.117687E-11 7.12058E-11
1.148154E-8 1.14401E-11 7.228987E-11
1.202264E-8 1.208482E-11 7.139323E-11
1.258925E-8 1.260499E-11 7.079397E-11
1.318257E-8 1.310031E-11 7.044546E-11
1.380384E-8 1.336079E-11 6.981954E-11
1.44544E-8 1.389263E-11 6.92202E-11
1.513561E-8 1.469459E-11 6.916948E-11
1.584893E-8 1.516672E-11 6.871055E-11
1.659587E-8 1.576547E-11 6.757622E-11
1.737801E-8 1.621484E-11 6.671775E-11
1.819701E-8 1.668575E-11 6.702031E-11
1.905461E-8 1.734815E-11 6.485645E-11
1.995262E-8 1.801204E-11 6.469914E-11
2.089296E-8 1.864987E-11 6.346055E-11
2.187762E-8 1.90917E-11 6.322876E-11
2.290868E-8 2.00037E-11 6.249604E-11
2.398833E-8 2.053235E-11 6.138248E-11
2.511886E-8 2.13325E-11 6.136034E-11
2.630268E-8 2.210953E-11 5.967715E-11
2.754229E-8 2.288332E-11 5.920008E-11
2.884032E-8 2.353838E-11 5.919545E-11
3.019952E-8 2.392712E-11 5.788643E-11
3.162278E-8 2.460599E-11 5.752264E-11
3.311311E-8 2.563254E-11 5.591018E-11
3.467369E-8 2.632125E-11 5.528915E-11
3.630781E-8 2.697333E-11 5.415331E-11
3.801894E-8 2.790204E-11 5.308508E-11
3.981072E-8 2.840655E-11 5.214836E-11
4.168694E-8 2.892832E-11 5.18637E-11
4.365158E-8 2.997757E-11 5.078954E-11
4.570882E-8 3.043194E-11 5.018665E-11
4.786301E-8 3.098582E-11 4.83115E-11
5.011872E-8 3.195799E-11 4.748554E-11
5.248075E-8 3.271387E-11 4.732292E-11
5.495409E-8 3.356967E-11 4.735743E-11
5.754399E-8 3.415622E-11 4.599268E-11
6.025596E-8 3.485879E-11 4.480208E-11
6.309573E-8 3.58387E-11 4.419262E-11
6.606934E-8 3.628062E-11 4.172071E-11
6.91831E-8 3.710602E-11 4.204108E-11
7.24436E-8 3.785204E-11 4.111704E-11
7.585776E-8 3.830761E-11 3.999484E-11
7.943282E-8 3.895E-11 3.882326E-11
8.317638E-8 3.967076E-11 3.809665E-11
8.709636E-8 4.074093E-11 3.894079E-11
9.120108E-8 4.163697E-11 3.744449E-11
9.549926E-8 4.235861E-11 3.683224E-11
1E-7 4.258413E-11 3.529595E-11
1.047129E-7 4.30589E-11 3.479578E-11
1.096478E-7 4.393344E-11 3.385706E-11
1.148154E-7 4.482553E-11 3.309694E-11
1.202264E-7 4.51211E-11 3.240391E-11
1.258925E-7 4.559888E-11 3.172512E-11
1.318257E-7 4.627238E-11 3.133895E-11
1.380384E-7 4.652221E-11 3.011645E-11
1.44544E-7 4.715263E-11 2.894555E-11
1.513561E-7 4.77351E-11 2.902339E-11
1.584893E-7 4.847374E-11 2.800089E-11
1.659587E-7 4.885512E-11 2.760791E-11
1.737801E-7 4.899688E-11 2.691577E-11
1.819701E-7 4.982674E-11 2.62831E-11
1.905461E-7 5.026228E-11 2.536569E-11
1.995262E-7 5.08568E-11 2.472331E-11
2.089296E-7 5.173821E-11 2.511633E-11
2.187762E-7 5.199488E-11 2.395881E-11
2.290868E-7 5.220498E-11 2.338464E-11
2.398833E-7 5.256937E-11 2.302628E-11
2.511886E-7 5.315605E-11 2.180095E-11
2.630268E-7 5.340712E-11 2.187772E-11
2.754229E-7 5.421675E-11 2.138282E-11
2.884032E-7 5.474222E-11 2.084176E-11
3.019952E-7 5.490573E-11 2.063249E-11
3.162278E-7 5.517836E-11 1.953465E-11
3.311311E-7 5.507495E-11 1.895554E-11
3.467369E-7 5.560459E-11 1.821947E-11
3.630781E-7 5.618174E-11 1.852503E-11
3.801894E-7 5.663412E-11 1.750688E-11
3.981072E-7 5.714548E-11 1.681206E-11
4.168694E-7 5.782122E-11 1.711631E-11
4.365158E-7 5.811429E-11 1.650722E-11
4.570882E-7 5.856874E-11 1.680813E-11
4.786301E-7 5.87147E-11 1.550976E-11
5.011872E-7 5.927809E-11 1.502435E-11
5.248075E-7 5.958994E-11 1.453312E-11
5.495409E-7 6.003046E-11 1.449957E-11
5.754399E-7 5.96246E-11 1.424461E-11
6.025596E-7 5.978649E-11 1.325153E-11
6.309573E-7 6.019682E-11 1.304472E-11
6.606934E-7 6.078972E-11 1.283885E-11

arstern

USA
237 Posts
Posted - 05/31/2017 :  4:47:43 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi,

See if this link helps http://www.originlab.com/doc/Tutorials/Fitting-NLFit-Basic.

You will have to use the Fitting Function Builder to input your equation and define your constants, variables, and parameters. What are you defining as your Dependent and independent variables?

Thanks,

Aviel
OriginLab
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Hideo Fujii

USA
1582 Posts
Posted - 05/31/2017 :  5:43:50 PM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Hi kanzhipeng,
Just an additional info... it seems it's a y'=a*y type differential equation.
You can also read the article:
http://www.originlab.com/doc/Tutorials/Fitting-Ordinary-Differential-Equation

--Hideo Fujii
OriginLab
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