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dean.pask
UK
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 Posted - 05/21/2009 : 07:25:54 AM
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O7.5 SR 2 (also O8 but not on this machine)
I have been off the tools for a bit, joys of management :-( so sorry for the basic question.
How can I plot the linear regression results directly onto a plot. I am pretty sure I have done this before!
Any heads up would make an old man happy.
Dean |
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emily_yu
China
37 Posts |
Posted - 05/27/2009 : 06:06:58 AM
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If you want to do linear fit in Origin7.5, please do the following steps:
1. Import the data into a workbook.
2. Highlight the data, and select Plot: Line.
3. Activate the graph and select Tools: Linear Fit to open a dialog box.
4. Click Fit button, then you will get the fitted curve on the plot.
I hope this is what you want, if not, please tell us what results you really want.
Best regards,
Emily
OriginLab Technical Services |
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dean.pask
UK
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Posted - 05/27/2009 : 11:53:12 AM
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Hey,
Thanks for the reply.
My mistake for not explaining correctly.
I was looking to display the fit results such as y = a + b * x directly onto the plot without having to manually add the text.
Is this possible?
Many thanks.
Dean |
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Laurie
USA
404 Posts |
Posted - 05/27/2009 : 11:59:55 AM
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Hi Dean,
In Origin 7.5, please select Analysis:Fit Polynomial. In the dialog that opens, set the Order to 1 and check the "Show Formula on Graph" checkbox.
Laurie
OriginLab Technical Support |
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dean.pask
UK
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Posted - 05/27/2009 : 1:18:35 PM
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Laurie,
Many thanks, I knew it was there somewhere :-)
Not sure if your area, but is standard deviation quoted in the linear regression stat's 68% of the data i.e. 1sd?
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displaying Y = A + B * X results direct onto plot