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How to add Column in nonlinear equation fitting

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jayantkolte

India
Posts

Posted - 06/20/2016 : 10:54:43 PM

Originpro 2016 SR0
Operating System:Windows 8

I want to fit experimental data with the following functions
P(V) = Ps*tanh(V-Vc/2d) where d is a separate term and
Qnsw(V) = C*V + integration from 0 to t (V/R)dt

So the toal function which has to fit is like
Qtot(V) = P(V) + Qnsw(V)
I have calculated separately the value of Qnsw and is in a separate column.
SO the fitting function will be
Qtot(V) = P(V) + col(D)
My query is how can I add col (D) into Origin nonlinear equation for fitting?

Thanking you,
Jayant

Mariyaphilip

United Kingdom
1 Posts

Posted - 06/21/2016 : 01:31:13 AM

Non linear equation fitting is an important concept in statistics. There are many techniques to solve this problem. Refer http://academic-essay-writing-service.blogspot.in/ for more details.

yuki_wu

896 Posts

Posted - 06/21/2016 : 05:36:47 AM

Hi,

I think you can change the function into:
Qtot(V) - col(D) = P(V)
in which Qtot(V) - col(D) can be indicated to NewQtot(V).

In order to calculate the value of NewQtot(V), you can add a new column in worksheet and set the column values as “ col (Qtot(V)) – col(D)”.

At last, you can do nonlinear fitting with the new function:
NewQtot(V) = P(V)

Hope the information helps.

Regards,
Yuki
Originlab Technical Service Team

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