| T O P I C R E V I E W |
| hassan2020 |
Posted - 01/31/2009 : 11:54:11 AM
Hi
I'm a biginner in origin.
can you please to show me how to fit this function in originC
y=sum(P1*exp(x)/k +P2*x**2) with k=1,1000
thanks |
| 3 L A T E S T R E P L I E S (Newest First) |
| Deanna |
Posted - 02/02/2009 : 01:55:01 AM
With a little bit transformation, your equation can be rewritten as (please correct me if I am wrong):
This is actually a simple equation. There are two parameters, P1 and P2. The equation written in Origin C can be:
y=1000*P2*x^2+7.4854708605503*P1*exp(x)
Here is an example of defining a fitting funciton with Origin C:
User Defined Fitting Function using Origin C
If you are still not sure how to define your function, please contact us again.
Deanna
OriginLab Technical Services |
| hassan2020 |
Posted - 02/01/2009 : 06:15:54 AM
Hi
y=sum(P1*exp(x)/k +P2*x^2) with k=1,1000
means
y=(P1*exp(x)/1 +P2*x^2)+(P1*exp(x)/2 +P2*x^2)+(P1*exp(x)/3+P2*x^2)+..
thanks |
| Deanna |
Posted - 02/01/2009 : 04:12:31 AM
Hi Hassan,
We are very happy to help you. But, please tell us what do you mean by "sum()"? In "P2*x**2", the "**" just means "*", right?
Deanna
OriginLab Technical Services |
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