Curve Fitting - F1

[wzelik]

Dear Collab Users

I need urgently fitting equation for nonlinear curve.
Could you advice me?
I tried to find similar exapmples into the history of forum unfortunately without success.

W. Zelik

ZMR
POLAND

[ValeryOchkov]

On 12/29/2009 4:19:58 AM, wzelik wrote:
>Dear Collab Users
>
>I need urgently fitting
>equation for nonlinear curve.
>Could you advice me?

When a curve is "strongly nonlinear" we can do so.
Do an interpolation for all range and a fitting for the work (selected) range. See one example please:
http://twt.mpei.ac.ru/MCS/Worksheets/HEDH/Tab-5-5-6-2-Therm-Cond-Solids.xmcd


Val
http://twt.mpei.ac.ru/ochkov/v_ochkov.htm

[ptc-1368288]

On 12/29/2009 4:19:58 AM, wzelik wrote:
>Dear Collab Users
>
>I need urgently fitting
>equation for nonlinear curve.
...
>
>W. Zelik
>
>ZMR
>POLAND
______________________________

So, what is the task from Theodore tabulated CT1...8 ?
There is no profile in the data, just like random noise.



jmG

[TheodoreM.Bones]

The data such as CT1 refers to the first column on the original SL data matrix. CT8 is the last column.

You don't fit the fitting data, mistake. The stand alone fwmily of curves are closely like each other except the first, CT1. It is not visible on your grsph, needs larger symbols. But I can't find any common mother function of them all.

[ptc-1368288]

On 1/12/2010 10:50:51 AM, study wrote:
>The data such as CT1 refers to
>the first column on the
>original SL data matrix. CT8
>is the last column.
>
>You don't fit the fitting
>data, mistake. The stand
>alone fwmily of curves are
>closely like each other except
>the first, CT1. It is not
>visible on your grsph, needs
>larger symbols. But I can't
>find any common mother
>function of them all.
______________________________

I understand what you are saying Theodore,
but understand nothing in the data set !
If the plot you have ... mean something,
easy to refit to avoid the glitches.
The collab is gone fishing, for ever ?

Jean

[TheodoreM.Bones]

I think the collab fished the data from a FactSage page from the firm where he worked and wanted to convert it to MathCad. I recall seeing a page in Polish on Tom Gutman's site on this thread. Looks like collabs from Europe dump numbers on us and vanish when asked for a sensible follow up. Happened 3 times in past half year.