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greenorest
Germany
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 Posted - 02/27/2008 : 09:41:40 AM
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Origin Version (7G SR1 v7.0303):
Operating System: Windows Vista or XP (does not make difference)
Hello everyone,
I have a very annoying problem when fitting curves to my data.
First, I fit any kind of function (predefined or my own ones) to my data using the 'Advanced Fit'. Well, and everything works fine. Each time I click on the interations buttons, the curve evolves a bit and finally looks nice. Means Origin shows a nice, smooth fit curve in the preview.
Now, I click on 'done' in the Advanced fit window ... AND my nice, smooth curve is eigther GONE or looks very ugly, only consisting of a few straight lines with a lot of edges. The results from the fit are correctly displayed in the window that automatically appears.
It does not happen every time I use origin to fit.
HELP! It does happen to my colleagues, too, but noone has found a solution so far.
Best regards, Tina |
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Laurie
USA
404 Posts |
Posted - 02/27/2008 : 6:06:51 PM
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Select Scripts:After Fit. What is your "Generate Fit Curve" setting? A uniform X of 60 points is the default when iterating, but if you have Same X as Fitting and you have few X data points, when you click Done, your curve may not be as smooth.
OriginLab Technical Support |
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Baobob
France
5 Posts |
Posted - 11/18/2010 : 09:53:51 AM
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Hello,
My setting is on uniform X and my curve also disappears:
Settings:
And result:
Origin 7.5 SR6
Windows 7 |
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Baobob
France
5 Posts |
Posted - 11/18/2010 : 10:17:30 AM
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If I rescale the graph and have a closer look at the generated worksheet, I realize that the curve is totally wrong:
The experimental data is the black rectangle at top left, and the fit curve changed to a horizontal line at -22.07 with a *huge* range for the X axis that doesn't even match the X range in the worksheet NLSF1 (from 350 to 1100, like it should).
I really don't get it.
Origin 7.5 SR6
Windows 7 |
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Baobob
France
5 Posts |
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Fit curve disappears!