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u@nlo
India
10 Posts |
 Posted - 08/21/2012 : 03:20:29 AM
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Origin Ver. and Service Release (Select Help-->About Origin):
Operating System:
origin pro8 sro
v 8.0724
i want to learn about curve fitting of a data using my own functions...how to write user defined functions and how to work out with them..
<b><i>U@NLO</i></b> |
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5*10
Germany
Posts |
Posted - 08/21/2012 : 03:59:56 AM
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Hi,
try to use first the Fitting Function Builder. This is a step by step guide which leads you through the procedure to built your own fitting function.
This should be the first step. After that you will have more specific question which can be answered more easily in this forum.
As well the tutorials on the origin website are good to learn.
5*10 |
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u@nlo
India
10 Posts |
Posted - 08/21/2012 : 04:23:33 AM
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Thanks for reply... i tried the same alreday where i tried for exp function given in tutorial....actually my function contains integral function in it and some parameters to vary...so can you please tell me how to proceed with integrals and derivatives and to buil a code for them and using this to fit my data after iterations
<b><i>U@NLO</i></b> |
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JessieWoo
China
46 Posts |
Posted - 08/21/2012 : 05:11:09 AM
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Hi,
You might refer to the tutorial “Fitting with Integral using NAG Library” in Help: Tutorial: Fitting.
Best Regard,
Jessie
Originlab Corp. |
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u@nlo
India
10 Posts |
Posted - 08/21/2012 : 09:29:00 AM
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Infact i am unable to locate those ...could you please give some links regarding this .....how to write integral functions code and for nolineat curve fitting..
<b><i>U@NLO</i></b> |
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JessieWoo
China
46 Posts |
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u@nlo
India
10 Posts |
Posted - 08/22/2012 : 05:56:02 AM
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thanks for the replies ... i got some tutorial regaridng NAG for origin the same given in the link....when i used this in compilation it gives
Error, function or variable NAG_FREE not found
Could please tell me the significane of this NAG_FREE and why this erro message.....
<b><i>U@NLO</i></b> |
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JessieWoo
China
46 Posts |
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u@nlo
India
10 Posts |
Posted - 09/02/2012 : 08:20:58 AM
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can anyone please answer how to go for a multi fit...
suppose if i use y is sum of two peaks p1 and p2 ...if i write a function y=y1+y2; sum curve data will come..but how can i get the data for the two curves of p1 and p2 and their sum y ' data individually in the fitted curve.
<b><i>U@NLO</i></b> |
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u@nlo
India
10 Posts |
Posted - 09/04/2012 : 2:28:37 PM
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suppose if i use y is sum of two peaks p1 and p2 ...if i write a function y=y1+y2; sum curve data will come..but how can i get the data for the two curves of p1 and p2 and their sum y ' data individually in the fitted curve.
<b><i>U@NLO</i></b> |
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u@nlo
India
10 Posts |
Posted - 09/04/2012 : 2:30:36 PM
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suppose if i use y is sum of two peaks p1 and p2 ...if i write a function y=y1+y2; sum curve data will come..but how can i get the data for the two curves of p1 and p2 and their sum y ' data individually in the fitted curve.
quote:
Originally posted by JessieWoo
Hi,
I have noted that the version of Origin you are using is not Origin 8 SR6, where I have tried and no such error happened. So, please update to Origin 8 SR6 from the following page and try it again:
http://www.originlab.com/index.aspx?go=Support/ServiceReleases
Also, our latest version is Origin 8.6. If you are interested, you can download a free demo here:
http://www.originlab.com/index.aspx?go=Downloads/OriginEvaluation
Best Regard,
Jessie
Originlab Corp.
<b><i>U@NLO</i></b> |
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NL fitting